Embarrassed about this...

My husband and I have been together for 7 years and have a 10 month old son. Prior to pregnancy, I was on the pill, which totally killed my sex drive for about 6 months or so. Once off the pill and pregnant, sex actually was very painful and was a total turn off, so we didn't do it very often.

Basically, I'm starting to think I'm asexual, because I NEVER want sex (but I didn't think you could "become" asexual, so I have no idea what's going on). My husband thinks it is him, but I love him very much and am still attracted to him. It is definitely not him, but he won't believe me, and it's led to a lot if guilt and stress. I had a very active sexual appetite prior to going on birth control, and because I lost interest in sex on birth control, I never went back on it after our son was born. I actually HATE that I don't want it, because I want to want it! Anyone have any advice or similar issues?