Pregnant????

Katie
My boyfriend and I were making out and he put it in without a condom but for just a second, literally 3 seconds and then he pulled out. He wasn't even close to cumming at that point. But <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> is telling me I should be on my period. I'm 3 days late. And I cramped really bad for one day but I'm not cramping at all now and I'm not bleeding yet. My boobs are sore and bigger which always happens around my period. I'm also on accutane which I've noticed shortens my periods significantly. But do you think I could be pregnant? It was more than a week ago we did that and I'm getting really really nervous.