Major anxiety

My wife and I talked about our ttc plans. We decided wait until our daughter turns 3 to try. I'm happy but really terrified at same time. I keep on remembering all of the heart breaks miscarriages to bfn. Now I have pcos and still one good tube well other damaged due to ectopic pregnancy. I keep having these dreams where I am either pregnant and suffer a miscarriage at 6 months or where I am chasing a stroller with our son that I never catch. I try not to think bad but Idk. My mom recently bragged about how was easy for her n my sisters to get pregnant. I wanted cry but I walked kitchen and my aunt in law n wife followed me told me it going be different this time. I asked how they knew said faith but thier faith isn't enough I have my own. That's the problem I don't know how find mine. I mean even in my dreams it ends bad.