What should I do

I have sex the day before Valentine's Day my period didn't come on that month at all it came on the beginning of March I just thought it was a regular period but it lasted 9 days and I usually last five days I was thinking that it was just a few days longer because I missed the month before but at the end of March I started bleeding again I'm not bleeding no more I'm always sleepy and hungry and my stomach always hurting and I've been having sharp pain in my chest and in my breast and peeing more then I usual do what should I do