Opk... Question...

I Had a miscarriage wasn't even 6 weeks on the 27oct... So 3 weeks ago. Yesterday afternoon (top) I got an obvious pos opk, second one was last night and third was this morning (neg). We bd last night and pretty much every other to every couple days the last 2 weeks. I didn't even think I would ovulate, but I had really strong ovulation signs and pains so I bought some cheaps. So has anyone ever gotten pregnant that soon? Was it healthy? My doc didn't say to wait but Idk how I'd feel about it.