Am I Pregnant?

I’m 3 days late on my period and am never more than 1-2 days late. I’m not on the pill (makes me sick) so my boyfriend and I just use condoms. We were fooling around (and drunk I might add) maybe 2 weeks ago and he had his penis in me for maybe 30 seconds but then we put a condom on. We own a home together and plan on getting engaged very soon so yes we are responsible 20 something adults lol and can provide for a child if needed, but ideally not for a few years! I know the chance of being pregnant from precum are very slim. Any advice or thoughts are appreciated! xo