I Haven't Felt Well For Over A Month. Extreme Fatigue,

I haven't felt well for over a month. Extreme fatigue, joint and bone pain, headaches and nausea and have been running a l ow grade fever in the evenings for several months. Tonight my fever is 101.1.
I am 65 years old, female with a history of chronic migraines, fibromyalgia and various colon issues. I take meds for high blood pressure, cholesterol, acid reflux ( I have an ulcer) and medication for sleep
Should I get myself to an ER or insta care? I have also been suffering feeling cold all the time. It's summer and I'm sleeping with a heating blanket.