Confused

Okay so my boyfriend and I had sex on the 11th of this month, glow says I was at 11% for pregnancy. We had no protection (which I know it's not the best idea) and were doing anal. Before he started he touched the hole of my vagina with the tip but didn't go in, could the pre cum get me pregnant? I have been feeling some cramping since yesterday. I feel like that is just ovulation. Any answers would help!