White Discharge 3 Days After Sex?

Me and my boyfriend had sex this weekend (March 5th, 2016). We were using a condom and it broke, we went to the nearest Walmart right away and bought Plan B (probably took about 1 hour). This is our 2nd time having sex, we only became sexually active very recently and I'm not on any birth control and neither of us are in any position of having children so hopefully I'll be able to get a secure method of birth control soon. It's been 3 days now and I'm experiencing light cramps in my lower abdominal region and I just had white discharge starting today, is that normal?