Haven’t been eating past three days?

Jo

So I’ve completely lost my appetite. I don’t feel like eating and I just feel nauseous. I started my period yesterday so that may be why but I’ve never had this symptom before? Ive has to force myself to eat some saltine crackers cause I needed to take ibuprofen for cramps. I only had some Steak ‘n Shake yesterday cause it was for a date and I couldn’t eat all of it. I still haven’t eaten anything today. It’s making me woozy and I think I’m getting headaches cause of it