Ttc husband says sex is a chore what can I do to spice it up!

My husband and I have been trying to convince for over a year I had a laparoscopy surgery for endo in January and they found a lot and removed it ever since then we have been trying this is the 6 month mark and I'm getting really depressed and stressed out ,last night my husband said it was a chore having sex and boring , I'm so devastated I don't know what to do to spice it up, I feel so down and lonely , I don't have anyone to talk to for advice ,Im glad he was honest enough to tell me , we both want a baby so bad 👶 and last month we thought we had a positive but turns out AF came.. I feel like it's all my fault because of the endo we can't get pregnant and I'm 35 I love my husband so much , I know he loves me too but maybe because we have been trying so much it's become a chore now .. Anyone got any ideas??