There was no pre-cum and He wasn't able to penetrate

I have told my boyfriend mulitple times that I wasn't ready for sex. That I wanted to wait. But he is a jerk and didn't listen. We were fooling around on January 28,2014 (2 days ago) and he said to close my eyes because we were trying something new. I closed my eyes because I HAD trusted him. I started feeling pain down there and opened my eyes immediatley. He was trying to penertrate into me but couldn't because of our awkward position.Not only that but with no condom! He kept trying but nothing. I kept asking him to stop but he told me to shut up. I started crying and he stoped trying saying he'd stop if I gave him a blowjob. I didn't do it, but I did check for pre-cum before slapping him and storming out.  That was on the 26th day of my cycle. There was no pre-cum. He wasn't able to penertrate but could I be pregnant? I know what you're thinking every guy pre-cums when he's sexually excited. But he wasn't. 100% no drop of liquid what so ever. According to the app 'Pink Pad' my cycle happens about every 2 days. They also say that as of today (my 28th day) I'm 4 days late. I've bee really stressed about competitions and performing. But this pregnancy scare is drivining me crazy. Could I be pregnant or is just to much stress?