I want to give up!

I have been ttc over a year and absolutely nothing works. Every sits and says well if you stop trying that's when ta gonna happen. Yeah, ok! I am so extremely stressed out and cry almost every time I see a negative result and feel like a useless let down to my fiancé. He tells me over and over it isn't my fault and don't get sad but I can't help it. It's Father's Day today and he kept telling me a few days prior he thinks I'm pregnant. I took a test this morning cuz AF is due today and no sign but BFN! We used pre-seed and soft cups every time we have sex now. He takes men's one a day and I was taking prenatal a but I stopped. Idk what else we can possibly do to help us