Is Pregnancy Possible Through Non-penetrative Sexual Activity?

Hi so here I go, my last menstruation was between mar 11-13 and we went on my bf's house on mar 14, we messed around.He rub his ***** to my vagi. w/o underwear It was around for a minute and it was done twice. He didnt cum he said . He didn't insert it because I'm a virgin. Its been 1 month since that rubbing thing happened. I got my period on apr 3 and it was lasted for 6 days and got a little darkish on the next day. It was only little I promise. I dont get symptoms at all, all of symptoms I experienced was now gone , it was gone when my mens had also gone. But I'm a littleconfused. It was spotting or period? Because I changed my napkin two times a day only or is just I used longer napkins. I'm confused. I'm irregular. SOmetimes it is sometimes it is not. So my period is abnormal hahaha. I'm kinda confused. I dont use pregnancy test yet cause I dont have symptoms at all. Could I be pregnant? or not? Is there a higher chances or not? If it's pregnancy scare, how can I avoid it to avoid my delay in period? Thank you so much