lost my virginity

Lauren
So basically I lost my virginity to a guy who I thought really liked me and then a couple days later he decides we should be just friends.. gotta love boys. 
Anyway so my only concern is I'm not on birth control and he was wearing a condom but he came inside me.. this scares me because I was ovulating during the time and now I'm scared I might be preganant..
Someone tell me if I'm just acting silly and the chances are not big enough for me to worry, or if I have a good chance. 
Thanks!