My Name Is Rachael, I Had An Abortion On 23rd

My name is Rachael, i had an abortion on 23rd April dis year, after two days i saw blood (reddish brown) dat lasted for 3days, I had unprotected sex with my hubby MAY and took postinor2, d following week had sex n took postinor2 again, now i have nt seen my flow, i have run pt test twice and its negative, what could be d problem? What can i do now?