Can someone please tell me what i have or whats wrong with me??(description inside)?

my stomach is bloated. my stoach muscles are tightened, it hurts when i move. im constipated. i have a yellow discharge in my panties (i wear panyliners so my panties are okay but still). i know this cant be my period coming on because it just wen off on the 20th of this month. but on the last 2 days of my period my stomach was hurting like this. just not as bad. can someone plz tell me if i need to be checked out at the doctors office or if i just need to take a laxative or eat something. idc i just want the pain to go away! thanks!