I pill consumption. And on what dates?

Hi I missed my periods for the month april . I had unprotected sex with my bf in March in that month i took i pill just to be safe on 19th of March then I had bleeding on 27th of March for 4 to 5 days. My regular periods date is 10th and in March also i had my periods on 10th as well as on 27th march so i bleed for 2 times for the month of March . I also did the pregnancy test few times in March with first morning pee and it's negative. I missed my periods for the April month and waiting for the month of may . Plz can someone explain me in little detail will my periods get back or it will never come back. Is it because of i pill. Do the i pill is bad for the periods .. will my periods come and on what dates ?? Plz ans in little details.plz i just did pregnancy test with morning pee 11th may.. it's negative