2DPO...when should I be able to see my BFP?!

Jac
I am 2DPO today... I got pregnant in December (without trying) and found out January 17 I had a chemical pregnancy... my doctor said I could try again right away and that there was no need to wait. I read that after a chemical or a miscarriage that you are super fertile so I'm hoping after BD every day this month I will receive another BFP... when should I start testing?/when was the earliest DPO someone has received a BFP?!