Help with sex :(

Me and my partner have not long lost a baby, but even before that I feel it was a chore for me to have sex like I don’t really always want sex, I could have it once a month, but he wants it all the time, is it normal to not want sex ? But we’re trying again for another baby and I suffer from depression and stuff but I’ve felt this way before we lost the baby so it can’t be that anyone know what it can be ? Or how I can help it ?