ON BC PATCH, NO PERIOD

OK so i got back on the patch about a month ago, after not having bc for 2mos(ring was makin me crazy). well i followed the directions(like i did before)and i'm on CD 2, but no period, no discharge, no pains nothing...i was on the patch for a year before, and always started usually the morning after i took my patch off(i take it off the night b4 my period, so i can shower)...i took it off on tuesday, was supposed to start wednesday, and here its friday, and nothing. an hpt told me - yesterday...my thing is, even though my patch was on(i had to start on an emergency thing, so i started it the 4th day of my af instead of that sunday)...is it possible that i still ovulated in july, since i didnt put my patch on when most people start? my period ended on the 12th, and i ovulated the 18th, but didnt put bc on till the 9th i think(more than 1/2 way through my period)...my patch was actually due to be changed the day i ovulated, and since we thought we'd both be working leaving to time for lovin, i left it off for a few hrs b/c of my shower and such...however, on my OV day, i had the clear, stringy discharge, and we ended up having sex anyways...is it possible i still could have gotten pg?