Please don't give up!
This response is to your tooth, though. I had the EXACT SAME THING HAPPEN. Try to find a dentist that takes payments and get it checked out. If you wait as long as I waited (a couple of years) a simple refilling will turn into an expensive root canal, or in my case, an extraction. During the years I waited it got extremely painful, so going to a dentist now is worth the money because it will get painful and more expensive down the line. <3 I hope you feel better and what's left of the day turns better! <3