Can my girlfriend get pregnant from this situation?

So me and my girlfriend had protected only for about 2 or 3 minutes. I didn't come at all i dont believe, but she did. When i went to the bathroom to go check the condom just incase, it didnt leak. however there was some white residue on the outside of the condom not on the inside. I read that it was probably her come and not mine, or that it was the lubricant on the condom. I checked the tip of my and it felt a little wet probably because of the lube. i definitely dont think i came at all yet. i came back to her and i fingered her for little bit. The thing i am mostly worried about is that would i have gotten sperm on my hand since i was touching the head of my ? like i didnt touch the very tip, i touched the sides of the head. Because i masturbated a day before this day, so would there possibly be some day old *** on the tip of my , although i wiped it off? however i dont even recall touching the very tip just the sides of the head of the , idk i just keep overreacting cause im really scared she would get pregnant. also she has irregular periods so wouldnt that lessen the chance even more? please help me im getting too paranoid and it doesnt seem likely that i got her pregnant in the first place.