What should I do?

So my fiancé and I got pregnant last September, I was due this past June and we were so excited! We lost our baby boy in February and it broke our hearts. Now fast forward, we got the green light to go back to trying for a baby. And I want to try(like try try try) and he says he wants to try but he puts in no effort. I told him I want to start and follow my ovulation chart and have sex and SOME of the days(I don't expect to have sex every day) he said sure. But then when that time comes he's like "no I don't want to live my life following a chart" "if it's meant to happen it'll happen"....but I've also been taking a very high dose of Folic Acid due to what my drs want me to. I don't want to stay on these pills forever and I've been on them sconce February. Having sex ONCE every 2 weeks, just doesn't feel like it'll get me pregnant. Should I just give up for now and get back on my bc, or should I just see where things go?