Brain abscess? Or am I just paranoid

For starters I'm a very paranoid person and get bad anxiety when it comes to the possibility that I might die. I want to start off with a dental abscess I had left untreated for over a year because of pending dental insurance coverage for the procedure of a root canal on my upper front tooth. I was in pain at that time. Months later the dentist place finally called me but I didn't bother to pick up because the tooth didn't bother me anymore. Nothing has happened and like I said it's been a year. I would also like to add that the very same tooth had nothing wrong with it until it got filled, that's when the tooth abscess started. Now I don't know if this would be my paranoia but since yesterday I would wake up and my head would feel fine but if I were to lean my head on one side, preferably the side where that tooth is on, I experience a dull, headache. If I am standing or just out and about, I also experience a dull headache only on that side of my head around the back of it. Sometimes it goes away completely, then comes back. It is reoccurring, but the pain/pressure isn't severe at all, not even a throbbing sensation. Now this scares me because I have been reading how brain abscess could develop within two weeks, going to see my only pharmacy doctor but he would probably prescribe me with only migraine medication and stuff like that. Also half of my face has been feeling weird, not numb or hot but perhaps tight? Better way to describe it is as if the sun had beamed on that side of the face but it's not a burning sensation. I slept for that day and today I still feel the same.