5 weeks pregnant

Need your advice ! Woke up with hot flushes then I started to get really bad period pains not like normal period pains, so I went toilet and just sat there but nothing's coming out like blood everything's normal down there, so I got back into bed and after a while the pains disappeared & I've just taken one paracetamol to make sure the pains gone, has anyone else had this? What you think it is? I hope I don't misscarry 😞 I've changed my whole lifestyle ☹