I know the chances are slim, but could I get pregnant...

...from fooling around with my new boyfriend? My boyfriend and I aren't wanting to rush into sex (I'm a virgin, he is not), but we have fooled around. Two nights ago when I last saw him, we fooled around for the first time, he fingered me, and I gave him a handjob. It was dark, so I am not really sure if he ejaculated, and I feel too shy to ask. I didn't notice anything, or feel anything on my hand. We both were naked, but his penis didn't go near my labia/vagina. I started my period today, two days after fooling around. My period can be pretty irregular, so it doesn't have a set time, but on the 14th of last month I was midway through my last cycle. Maybe I'm just freaking out due to my serious lack of experience, but what do you all think?