Could this be my rainbow baby?

I had a miscarriage four weeks ago at seven weeks,  I was told by my  midwife I was there to have sex and that I’m extremely fertile. I had sex on 7 January and tested negative on the eighth and then decided to retest myself again today and it’s now positive it looks like I think am I just tripping,  could I get a positive three days after having sex since I’m extremely fertile???

Vote below to see results!