I don't want sex??

My fiancée and I always had sex. I got pregnant, did everything naturally. After I had her I went back on my birth control pills, they put me back on antidepressants and found out I had hypothyroid so them pills also. I started to realize I didn't want sex anymore. Like seriously ever. The hottest guy could be like "hey lets have sex" and id be like "eh I don't feel like it" . 😡 Sex doesn't feel good like it use to. I asked my dr of it was any of the pills and she told me he maybe just has to "try harder" I recently stopped taking my BC cause I believe it plays a deal in my depression. Any advice or any idea why this is happening?! 😅