Should I Worry About Pregnancy Without Any Real Ejaculation?

Okay so me and my boyfriend were messing around at about 2am March 29th. I was stroking his penis with I think my left hand but his shorts were covering it. Then, my boyfriend pulled down his shorts with his left hand and I was stroking his penis without clothing separating my hand from it. I was just lightly stroking it and some liquid came out. Not even a lot, just a little. I kept stroking it for a bit but then I had to get the precum(I think that s what it was) off of my hand. I wiped my hands off on his shorts. My hands WERE DRY. I do not believe there was anything wet on them. He then pulled up his shorts and he swears that he didn t touch his penis or anything with his right hand, the one he fingered me with. He then started to finger me and I put my right hand on his. I can t remember if I stroked his penis with my left or right hand but I m pretty sure it was my left. He went really deep I believe because he has big hands and he did that for a while. Then, I have him a handjob and he fully came. He didn t touch me anywhere after that. He promises that he didn t get close to his penis with his right hand before he fingered me. We went to sleep and when I woke up later that day around 8am, I started my period. I was supposed to start like 2-4 days before but that situation of starting a little late or early is usual. Today is April 3rd and my period ended yesterday, April 2nd. My question is, is there a chance that I could ve gotten pregnant? Even if somehow he or I had precum on our fingers but not even that much at all, even after we wiped it off and then he fingered me? Remember, I started my period the same day. I ve never had sex either. Please help me!! I ve been so worried over this. Please tell me some symptoms I would have if I had conceived and how long could my egg and the sperm stay alive, even when I started my period? Where is the egg when I started my period? And should I notice some physical changes?? PLEASE HELP ME!