Can anyone tell me what might be wrong with me please.

Jaylea

I feel nauseous all the time, I'm going off food that I normally love, I'm having a lot more discharge than normal, I'm 4 days late for my period, I keep having cramps and I'm tired all the time. I'm not stressed or anything and I haven't got any stds. But I am sexually active.

Any advice welcome, no hate.