Missed 2nd period post ipill. I do next?

I am 23,f. I had intercourse with my partner & took an ipill (May 11) though it was a protected intercourse, we doubt the possibility of a tear in the condom. However, post ipill i got my period on the expected date (May 27) which lasted for 3-4 days roughly(flow being okish to normal). My 2nd period was due on June 25, but it's missed (today is June 28). Post ipill, I had NOT been physical. I am travelling at the moment so pregnancy test is not an option as I am stationed at a very remote place. I will be back home by end of next week. 1) I am being paranoid and want to know why my 2nd period is delayed. 2) if the delay is common post ipill then when should I expect the periods to come? 3) what should I do next? Can there be a pregnancy post 1st period.