short answer: yes, you are missing out on growth hormone release due to the interruption of your sleep. Adrenals are likley producing cortisol at higher than normal levels to keep you functional during the day and to get you through the incredible intensity of cross-fit workouts. I agree with Mark Sisson, who writesYou’ve heard why I like CrossFit and P90X – and I do like them, believe me – but this is where we diverge: (...)overtraining is the biggest issue plaguing most trainees. If you don’t give your body enough downtime to recuperate, you’ll find it very difficult to get stronger/faster/quicker/more powerful (...) I think the 3 on, 1 off CrossFit schedule (...) can easily lead to overtraining (...) I love CrossFit, but people do get injured. (...) going too hard for too long, but injuries do occur. CrossFitters will plainly admit that there is an inherent danger to going all out, day in and day out. So there are my thoughts on cross-fit:)
Long version below. Some of it is beyond the scope of your question (ie answering questions you didn't ask and may not be interested in having answered) but as there are likely many other pregnant women or new moms reading, I'm going to expound.
Sleep is incredibly important and likely you are missing out on some of the deep restorative sleep and the resulting release of growth hormone. While frequent breastfeeding around the clock is biologically appropriate (and indeed beneficial) to a mother and baby in some settings, the evidence is clear that modern bedding makes sharing sleep too risky.
Moving baby to her own protected sleep surface is clearly, per available evidence, the right thing to do but the downside is interrupted maternal sleep.
Once it's clear that baby is feeding well, growing well, gaining well and that mom's supply is well established, working on getting baby to sleep for longer periods of time at night seems to be a reasonable consideration. At six months, habits are pretty well established so what follows may not be entirely helpful to you, but it may benefit other pregnant or new moms so I'll continue.
While much of the breastfeeding/IBCLC/midwifery/lactation support community tends to be staunchly opposed to swaddling and pacifiers, I do see room for appropriate use of those tools.
The concern with swaddling is valid: a baby that is swaddled will sleep longer and may not wake at intervals frequent enough to 1)remove enough milk to maintain a good milk supply 2)gain and grow properly. Both are serious concerns.
However, if we insure that baby is 1)growning and gaining properly, 2)nursing very frequently while awake 3) that mom has a good supply, then using swaddling to extend nighttime sleep and to help extend catnaps into a couple of naps per day tends to work really well.
If started early enough, swaddling will often encourage one five-hour stretch of sleep from very early on. As long as baby is nursing 8-12 times (or more) during the rest of the day, transfering milk well, having sufficient output and mom's supply is good, this one 5-hour stretch at night is not a concern and can be tremendously helpful for mom reduce a sleep deficit.
By the time baby is 10 lbs or so, the period of sleep will often extend to two 5-hour periods per night or sometimes the 5 hour period will just lengthen to six or seven hours.
A point of clarification, I don't recommend of support 'cry it out' sleep programs but do support and see the benefit for both moms and babies when it comes to gently encouraging longer periods of sleep. Not only is sleep deprivation bad for growth hormone release, but also driving while sleep deprived is as dangerous as driving drunk.
At six months, your baby has the physiological capabilities to sleep through the night. It may be worth considering options for gently reducing her reliance on feeding at night and encouraging longer periods of sleep. The No Cry Sleep Solution by Elizabeth Pantley is helpful for some.
No Cry Sleep Solution
The SleepEasy Solution isn't one I endorse wholeheartedly, but there is a lot of good information in it and it is worth reading. Here are two thorough reviews. (1 & 2)
The 90-minute Baby Sleep is written by a neuroscientist that studies sleep and is unbeatable for understanding the whats, whys and hows of infant sleep.