In your case, an NMR test is really not going to tell you anything of use. The only really useful parameter in an NMR is LDL-P and with an LDL-C (I am assuming thats what is was) of 363, your LDL-P is very, very likely going to come back very high since you no doubt have a boatload of LDL particles. The NMR will probably show Pattern A since this is common with people on "Paelo" diets but that doesn't mean anything other than that a preponderance of the large number of particles are large. People with familial hypercholesterolemia also have mostly large LDL particles and they still get heart disease.
So, the reality is that you have very high LDL and the NMR is not going to change that. The only question for you is what does that mean and what are you going to do about it. You still may want to have a physician try to rule out familial hypercholesterolemia and assuming its not that and also assuming you have no symptoms of any kind, the only reasonable conclusion is that your LDL went way up because you changed your diet. That has happened to scores of people myself included and as I see it and based on my experience, here is what I suggest:
1) Stop listening to the many Internet voices who, for the most part, have no idea what they are talking about (except this one of course :)
2) You can also decide to forget about the whole issue but you should realize that nobody has the slightest idea what the future holds for Paleo eaters with high LDL over time. Do you really want to experiment on yourself in this manner?
2) You can wait for a while to see if the number comes down over time. I have no idea how long is reasonable to wait so that would be up to you.
3) You can combine waiting with some dietary changes. Some people just seem to be "hyper responders" to saturated fat so you can cut down somewhat on that. I have been using more olive oil for cooking, some lard at times (half monounsaturated fat), and cut back on butter, cream (I use half and half), and I don't drink fat bomb smoothies or "Bulletproof coffee" anymore. If you are VLC, then I would also suggest eating a reasonable amount of carbs. I started with bananas and potatoes but I do now eat a slice of good sourdough bread most days and not to mention fruit and some other carbs. I have pretty much lost my "carbaphobia" but I don't go overboard either.
4) You might want to get Chris Kresser's series on high cholesterol. Its pretty good and you will learn a lot although I am not sure about his supplement programs. It would also be good to work with a sympathetic physician. Good luck on that.
5) Also, if that is your fasting blood glucose, I would keep an eye on that as its getting up there. If it goes up from there, it would definitely be worth trying to understand why.
In any case, come back here with your NMR results and I will try to help. Oh yes I forgot to say that my LDL went as high as 330 but after about 18 months, it started coming down and about two months ago it was 189 and I suspect my LDL-P is even lower. That reduction occurred BEFORE I started changing my fat intake and about a year after I started adding carbs. I will be interested in seeing my next report. I can't really say if it was time or the added carbs that made the difference.