Please help me, I'm a teenager and I'm so scared

[person28]

Hello, I'm a teenager and I'm so confused and scared if my partner is pregnant.
So, she got her period on 15th January - 22 January. We did sexual activity such as masturbating together on 24th January. I don't really remember if i finger her or not, but if i did I'm just scared i got some precum on my finger, i did not cum on her, she didn't do any contact with my cum. Now she's experiencing some kind of pms symptom like cramps and nauseous, but sometimes the cramps is gone, sometimes it is there, the nauseous is also like that, sometimes it appears sometimes not. The first cramp occurred on 8 feb - 13 feb, today (14 feb) just nausea a little for a few mins around 16:40 ish after big lunch (maybe it's because of lunch) but we don't know.
Is it normal for pms symptom such as cramps to be "sometimes appears sometimes don't" and it's been almost a week.

[CurfewX]

Unless you inserted your penis into her vagina without wearing a condom, it is not a realistic possibility that your girlfriend is pregnant.