I would drop the NO-Xplod. I beleive it's main ingredient is caffeine, iirc.

Also, here's the warning from the product: (note the dizzines side effect)

Warning

Before consuming N.O.-XPLODE seek advice from a physician if you are unaware of your current health condition or have any pre-existing medical condition including but not limited to: high or low blood pressure, cardiac arrhythmia, stroke, heart, liver, or thyroid disease, anxiety, depression, seizure disorder, psychiatric disease, diabetes, pernicious anemia, difficulty urinating due to prostate enlargement, or if you are taking an MAO inhibitor or any other medication. Do not use if you are contemplating pregnancy, pregnant, nursing, prone to dehydration, or exposed to excessive heat. Reduce or discontinue use if sleeplessness, tremors, dizziness, nervousness, headaches, or heart palpitations occur. Please be aware this product contains the naturally occurring amino acid beta-alanine, which may cause a tingling skin sensation in some individuals similar to niacin flush. This effect should diminish after a few hours and should ultimately subside after days of continuous use. Although rare, individuals with the genetic disorder hyper beta-alaninemia should not use this product. N.O.-XPLODE is only intended to be consumed by healthy adults 18-50 years of age. Keep out of reach of children and pets. Allergen Warning: Manufactured on equipment which processes products containing milk, egg, soybeans, shellfish, wheat, and tree nuts. CAUTION: N.O.-XPLODE is an extreme energy & performance igniter. Use caution when using with any other caffeinated products or if you are caffeine sensitive. Always begin use with 1 scoop or less and assess your tolerance. It is not recommended that you consume more than 3 scoops per day. To avoid sleeplessness, do not consume within 4 hours of bedtime.

No PWO carbs? Might want to add 100-200g of those in the form of sweet potato, potato, or white rice. I had the same problem for a few weeks, then I introduced a pound of yam or white potato after every workout. No more dizzies.

EDIT: Ben reminded me that I should probably mention that I have a pound of steak (top round -- very cheap) in addition to the pound of starchy food after each workout.

Where's your post workout drink? Waiting an hour before getting any real food after an intense workout with only a pre-workout drink = you're probably screwing your body over. Especially if you aren't fat adapted yet (you're crashing on your blood sugar levels).

When you're doing a x-fit WOD, you are burning glucose for energy; at that high of an output, fat is minimally being used for energy, even in a fat-adapted person.

What does this mean? If your burning carbs, eat some carbs!

When your blood sugar hits rock bottom (feeling light headed), that is a very stressful event for the body... cortisol is released to bump up your blood sugar levels. This can have some nasty downstream effects on testosterone, thyroid, insulin sensitivty, etc.

This is not a good thing. To prevent this from happening, make sure you have some carbs in you before and after the WOD. There will likely prevent these problems.

White rice, sweet potatoes, potatoes, bananas, whatever... any food carb source is fine as long as it doesn't have nasty plant chemicals (wheat, etc). They all get broken down to sugar anyway..

Try eating more real food. Fat, carbs, protein.

This was happening to me, and I found out I was anemic. So maybe check out your blood work.