Is my gf pregnant? Please help me ASAP

[jumbodude]

Hi, my gf has PCOS and recently taking progesterone-only capsules(Heragest) starting every 16th day of the month and takes it for 10 straight days. She had her period last Novemeber on the 25th day, December on 26th, January on 27th day and February on 28th day. We were never involved in sexual intercourse (putting penis inside the vagina). We only had oral sex, dry humps( with clothes) and fingering. We did this 3 times on the day 6-15. The only thing that I was paranoid is that the last time we did was a blowjob and I washed my penis after and my hand was exposed to semen, after that I flushed it and there was this thing I was holding on to and there was water in it. After an hour, I came back and accidentally touched it again, and I fingered her. She was supposed to get her period on the 28th day but she is 5 days late now. She is currently experiencing cramps since day 28, acne, her breasts hurts if touched and also the nipples are sensitive but did not get bigger and darker(she said it was growing and is normal for her as she's a late bloomer) cravings for sweets and salty foods, moodswings and her discharge is still continuing to decrease. She said, her discharge was yellow and gets smaller and thick everyday. Before that, her pattern in her cervical mucus during her cycle is Period>Dry>White>Yellow(Thick and increasing) >Yellow(Thick and decreasing)>White>Yellow(Today and still continue to decrease). Is my GF pregnant? There was no intercourse but only oral sex, fingering and dry humping. She did not ovulate for the past 4 months including now. She did not encounter the EWCM fluid. Please help me!
She was also stressed last week. To be more specific, school work, reports, emotional problems, family problems, our relationship problems and more