Cramping with a light pinkish color

Hey im worried because this has never happened to.me before. Here i go..., my period ended on this past saturday then throughout sunday i had light cramping i was quite moody that day on and off out of knowhere. Then monday i had seen a light pinkish color on my panties when i wiped and then throughout the day i have had light cramping and still light pinkish discharge on my panties again. I havent had sex in a week or so.Im clueless to what is happening to me. Can you please help me out? Thanks. So much