Weird symptoms

So like a week or so after my last period I got extremely bloated, nauseous, and some headaches. I figure just the normal cycle stuff. But then about a week after that my back started to ache, I felt more nauseous, extremely tired all the time, the bloating stayed and my abdomen area is tight or hard to the touch and my discharge is very white, and thick and lumpy. I’ve had some cramping but it’s very mild. Should I be worried? (I had unprotected sex the day my period ended and he finished inside me)