Chemical pregnancy advice

Erica • I recently had a miscarriage and we are trying to have a baby we have been trying for about 5 months praying and hoping
I had a chemical pregnancy on February 12th  I stayed bleeding until February 16th I asked my obgyn and she said I'm doing everything right and to just keep doing what I have been so my husband and Myself have been doing the baby dance a lot and now it's March and no period I used to have a irregular period till about October of last year then it was normal till I got pregnant in the end of January my question is can I still get pregnant that fast after the chemical pregnancy I have taken opk test two days in a row and they both look the same to me and that positive I took one pregnancy test the day after my period got a bfn help plz