Frustrated

Been married 7 yrs but only lived together the last 4 yrs. The last 4 yrs were honestly like living like a newly married couple trying to get used to each other. They were not easy we faught we didn't get along but we stuck it thru and finally I can say our love for each other is now more than ever before. We are inseparable. We have been trying to get pregnant also but in July I had to have a D&c 😔 the frustration is that my husband doesn't have sex with me the last time we probably did it was around April. I got pregnant because we are going for fertility treatment. I'm desperate for sex but he either loses his erection or just isn't in the mood. He's been sleeping on sofa since April also and it bothers me. I miss the times where he used to sneak up on me and grab me or other things. We haven't been fighting and we show our love for each other in other ways but I need sex. I'm frustrated and now he's leaving for a month to visit his family back home. I tried to get off work to join him but am unable to take off work 🙁 this was the first time in 4 yrs he was willing to vacation with me. So sucks but I don't know what to do about the sex part. I've tried talking to him about it but he just says how he's gotten lazy etc and admits he needs to change. ..urghh