Pregnancy

So me and my SO (trans male to female) never have intercorse sex due to the fact my SO doesn't want a penis so finds it hard to get it completely hard and also the meds she's on stops it from working properly. 
But she still cums, now there's been a few occasions where she's gone to adjust herself had cum on her hand and fingered me, thrusting the fingers in and out ect. I'm starting to feel sick all the time, and I can't lose weight. My period hasn't come and my bowl movements have changed and my boobs are becoming really sore. Is it possible I could be pregnant?? 
I'm also worried about her thinking I've cheated as obviously it's not that common to get pregnant that way. I need to do a test. But am I worrying for nothing ??