Yes
yes
Yes, it can even kill you.
Yes, abcessed tooth cause heart problem.
Worst case an abcessed tooth... which is horrifyingly painful.
Delerium, Death, loss of motor or neurological function such as speech !!
yes. If your tooth has an infection called an abcess, it can travel into the bloodstream. Abcessed teeth need to be extracted or treated with a root canal or periodontal treatment.
Yup
a painkiller, such as ibuprofen, and warm water rinses
Your gums bright red too? It's probably abcessed. See a dentist immediately!
Sounds like an abcessed tooth. You should go to a dentist and have it checked.
Normally it is quite difficult for any antibiotic to get to the abscess in an abscessed tooth. The infection is usually somewhere in the root and does not have a good blood supply. If your dentist gave you Bactrim, he probably did not give it to you to treat the abscess, but to treat the infection in the bone below the tooth. The usual way to treat the abscess, is to drill it out. It is not normally just treated with an antibiotic.
By far the best thing is to go to a dentist. Abscessed teeth can lead to a more serious condition, not to mention hurt a lot. The dentist will open the tooth and pack it with antiseptics and probably put in a temporary filling.