Pregnant or paranoid?

[afraid]

I'm nearly 14 years old and terrified that I could be pregnant. The last time I had sexual intercourse was in mid October. We used a condom and I got my period [5 days of varied bleeding] soon after. My boyfriend and I recently engaged in Anal sex without a condom, but he didn't orgasm. I had given him a blowjob earlier in the night and he ejaculated, so I know there is a possibility of sperm being present in his pre-cum. When he tried to insert his penis into my ass, it slipped a little and unfortunately neither of us can remember for sure whether it slipped up and around my butt or down, toward my vagina. I don't keep track of my periods very well, unfortunately, but I do know that in September it started on the 24th and lasted for 7 days and in October it started on the 27th and lasted for 5 days. About a week ago, I started becoming very worried that even a small amount of pre-cum could have entered my vagina and impregnated me. I haven't started my next period, though I estimate I probably should have around the very end of November. I know stress can delay a woman's period, so could the stress of thinking that I might be pregnant possibly have delayed mine? Also, possibly stress from schoolwork? I'm very sorry this is so long, but I just want to provide as much information as possible in order to get accurate opinions.

My questions:
- Do you think it's likely that I could be pregnant?
- If not, would stress be a likely factor in my late period?
- If you think I could be pregnant, how long do you think I should wait [possibly to see if I get my period] before I tell my mom?

Thank you so much to anyone who helps me.

[anon###]

ur probably just worryin about nothin, yes stress can delay a period so try n stop stressin!