Why does it seem our sex life is fading ??

So one thing that made me fall in love with my man is our AMAZING SEX life! Everyday any chance we had we were most likely having sex..he could never keep his hands off me!! I feel hard for him..then I got pregnant and it started to fade..now our son is 7 months but I had to have a c-section so longer healing time although all I couldn't wait and always tried to have sex and he would tell me the Dr says to wait..soo ok fine we get to do it after like 2 months and the past 5 months I can count all the times we had sex..I am working on getting my body back need to lose about 40lbs. But i feel soo insecure being I found out he watches porn..whivh he denies..lol. I'm assuming when he is in bathroom before his shower. Why can't he watch it with me...why is he pleasing himself..cause I'm sure that's why he is watching it..and NEVER wants it anymore from me.....i beg for sex and he uses the fact we have a son now and he has respect for me. Wtf does that mean? Shouldn't he still want to have wild sex with me still?? It's just making me feel insecure and depressed I don't even want to go out except to the food store lately...we have a great relationship besides the sex..why does he lie that he watches it? Is there something wrong with me? I get he respects me but what does that have to do with our sex life? Is it ever going to change? :( I will even get dressed up for him which then he can't resist and yes I have toys but I don't want to use them by myself.. I love the high I get during our sex with my toys.