Sickness, or period?

I’m nearing the end of my period but today I feel awful, cramps, light headed, constipation, and I’ve gone full blown sweaty and hot, ugh i actually think I’m running a fever I wonder if it’s actually my period, is anyone else feeling this way around the end of your cycle?

It actually just flared up this morning, yesterday I was feeling completely fine and all of a sudden it all hit me this morning I can barely walk without almost toppling over.