Losing Hope.

We haven't been trying to conceive very long, but I'm starting to lose hope and I want to give up. I had several miscarriages ( I think 7 over 6 years but I lost count) between my older kids. This was from my previous marriage. My husband has kids from his previous marriage as well but we do not have any together. He had his reversal and we have been trying... I had a lightly positive test the other day but started bleeding two days later and today my blood hcg was negative. I don't know if I can try anymore. I don't want to go through a bunch of heartache and miscarriages again. I don't even know what to do anymore.