Conceiving after a miscarriage

I had a miscarriage a little over a month ago and it was a very unexpected pregnancy. I was only 7 weeks along at the time, but it was very hard my boyfriend and I. We are unsure if we want to try again so I tried getting on birth control since we realized the pull and pray method didn't work. I hated BC, so I didn't take it this month. We got in the moment the other day and the way I got pregnant the first time happened all over again. According to Glow I was only at a 3% chance, but many people tell me you're much more fertile after a miscarriage. Does anyone know if this is fact or fiction?