I am very confused dr I need your help. I had sex just once with number 1 on 5/21. I got my menstrual on 6/01 and it lasted for 4 days (usually last 4-5 days & it was normal). I had sex with the person number 2 on 6/18 and bled right after (not sure if why). I was suppose to get my period on 7/02. So far I counted the time from both dates & they are about a month apart. Can you please tell me who may possibly be the father?

'I am very confused dr I need your help.'
Anyone on this site can respond, not just doctors. I am not a doctor.
Conception does not happen on exact dates. There is no way anyone online can tell you if you are pregnant or not, or which time you might have conceived, or whether bleeding was menstruation, or just spotting between periods.
With all this worry, I trust that you are now getting birth control.
I would suspect that since you had a full period after 5/21, that you did not conceive then. But it's even possible to have a period and be pregnant, although rare. ANYTHING is possible.