Im having a hard time determining if I'm getting sick or possible pregnancy symptoms.

All of these have just started today.

Back ache

Headache all day

I've Been alternating between cold and hot, like my body can't pick a temperature.

Also fatigued.

AF is due friday, so I'm trying to wait until then. But I'm thinking I'm just getting sick because my throat has been a bit irritated the last 2 days due to leaving the bedroom window open all durring the past weekend.

Opinions greatly appreciated.