Late on period

Its been about 35 days now and i normally get my period in the early 30's late 20's range.
I haven't had sex, but i have done oral on my boyfriend. Is there any possible way that i could have gotten pregnant from oral.
I haven't done it in the last week. more like 2 or 3 weeks ago. The only thing is he didn't cum in my mouth, so is that possible at all?

ive been looking around on the internet, and it says that stress could be a reason why i am not getting it. i've been worrying about not getting it ALOT. so could that be the reason. also. ive noticed ive been peeing alot. is that just because ive been thinking about it?
im so terrified that i might be pregnant but i dont think there is any possible way i could be. i freaking out. and im scared that i might miss my period completley.
should i go take a pregnancy test?