I have an issue with my finger It’s tender to touch and I have a headache that won’t go away?

I have an issue with my finger and can’t seem to figure out what it is. I think I may have been attacked by an angry ant but unsure. It’s tender to touch and I have a headache that won’t go away and I have a 100.2 fever. I just started using beynadrly orally and Cortizone10 on the skin.