Has anyone ever been on Ortho Evra or the generic Xulane? I have a question.

I decided to try it because I have painful periods but not the biggest fan of hormone based birth control.
Well, I started it over a week after the start of my period. Got my period Feb 24th and started the patch Mar 7th. I'm wondering if it helped any at all stop ovulation. As I had unprotected sex with my boyfriend on Mar 9th and the patch was barely sticking. Half of it it came off and then it got stuck together but half of it was still on. I didn't feel any side effect from the patch at all. Then I changed patches on my patch change day but maybe left about 6/7hours between when I put the new one on and took the old one off. Then yesterday, Mar 16th we had unprotected sex again. I have extremembely sore boobs(symptom from the patch, I assume). I'm just wondering what are my chances of being pregnant? My periods were 30day cycle but changed back to 28days last month. So I'm not sure when i ovulated. Going from a regular 28day cycle I would of ovulated when we first had sex but according to glow my fertile window ends today with yesterday being my highest chance of pregnancy.
What do you think are my chances? We wouldn't mind a baby right now. Like I said, I'm on the patch to help painful periods but we're not TTC either.
According to glow I would get my period(without the help of the patch) on the last day of the month and from a regular 28day cycle it'd be the 24th of the month.