Symptom check

I am supposed to get my period on Wednesday (it’s Monday). I have always been very regular and can predict it within a half day. Starting on Friday I started overheating and sweating a lot. Also have had headaches since then and can’t cool my body temp down unless completely still. Is this normal? Husband and I have not used protection since we got married 11 years ago and have not been successful in getting pregnant (not for a lack of trying). Thoughts?