sex after having a baby

So me an my boyfriend have been together for 1 year & 3 months now we have a 2 month old daughter. In the beginning we had sex almost every night ! When we found we were pregnant all that changed and me being so hormonal and horny I wanted sex every night but he never wanted it.. throughout our whole pregnancy we only had sex about 4 times the last time we had sex in our pregnancy was the end of July! We had our daughter on September 21st 2016 & I had to wait 6 weeks to have sex. Soooo last night we finally had sex & let me tell you it was PAINFUL 😖 once I started getting into it my daughter started crying soooo my boyfriend got soft 😩😩 so I did everything I could to get him hard again, once he got hard he finished me up. Buttt I couldn't get him to nut 😭😭 now I feel like something is wrong with me 😢 I'm embarrassed to even try to have sex again!! Question is "is something wrong with me?" Or "Did my daughter crying just turn him off?" I just feel so insecure now 😔 what do you guys think ?