Do me a favor, can you ask someone to take a photo of you stretching it against a ruler? I'm telling you, I remember when I had relaxed hair, my new growth just felt like steel wool. It's like it could not stretch so it seemed so much shorter than before.
You say you started taking prenatal vitamins and are working out and staying within a certain calorie count. All these changes could be an influence. When you build muscle and get fitter, your body's needs change too. So maybe your new muscles are taking from your nutrient pool. Maybe your lighter diet is not replete with enough nutrients to feed both your toning body and your hair. I don't know. I seriously think you need to stop checking growth. I think the fact that you are expecting "improvement" with your new regimen is also affecting how you see things. You know how someone can rave about a movie and then when you go see it it bores you to death. That could be affecting your perception. Or whatever changes you may have made recently, might be affecting your growth rate. I also think that you need to take a regular multi instead of a prenatal. I just compared Solgar products, the
multi and the
prenatal and some of the elements that are good for hair growth are less in the prenatal eg Vitamin A, B5 and other B vitamins, amino acids...to name a few. So go back to basics. Don't change anything that wasn't hurting you before. I think sometimes we make the mistake of changing too many things at once, or changing one thing that affects the equilibrium of everything and not making necessary adjustments. I think you should just focus no taking the supps that take care of your total body health and your hair will get its share and thank you. You focus on just "feeding your hair" and yet your body's needs get higher with your new workout regimen, and your hair gets to starve coz your body will take care of itself first (bigger, harder working heart for instance) and your hair gets left overs which as we have seen were not that plentiful to start with.