PLEASE HELP?! I don’t know what it is!

Rachel

My period finished Thursday

I had sex on Friday and on Saturday I had diarrhoea which cleared then weird sensations in my stomach like I want to throw up so on Sunday I felt better so I had sex again and I felt the same so on Monday it cleared then on Tuesday I had sex 3 times and I had abit of heartburn so I had something to eat now I’ve got sharp pains?!