Should I be worried ?

GF
I took a plan b about two weeks ago. The day of unprotected sex with my boyfriend of three years. I had my actual period June 2nd-7th. A couple of days after I took the plan b I started bleeding again June 15th-18th. I am now bleeding for a third time. My breasts have been sore for three weeks. I've kept this all logged in this app. But I still have no idea what is going on, should I be worried or is this supposed to be normal ?