Knowing the signs

So I had sex last Saturday (two days after my ovulation days were through) and had unprotected sex for just a few seconds before getting interrupted by other house guests. My boobs have been very sore the past 2 days, and i feel very bloated. Just overall “blah” feeling. Even though I think the chances of getting pregnant are low since 1) he didn’t finish and 2) it was only a couple of seconds, should I test soon? Are these just signs of a period coming or should I worry since my boobs and body are just starting to overall hurt? (And I’m not on b/c for medical reasons)