Help! I have a tooth abscess.?!

Help! I have a tooth abscess.?

I felt pain in my tooth and a little swelling in my left cheek. I went to the dentist and he told me I might have a tooth abscess, that's why my face is swelling. He then done a root canal for me. He said he didn't want to start me on antibotics because he was afraid of people getting immune to too many antibiotics. He prescribed me some anyways, but told me to hold on to it until the swelling get worse. It did got worse, and I started on antibiotics pen V 500mg q6h. Swelling hasn't gone done at all with pain. What should i do? Is it going to get bigger? It hurt so much I cried today.

2 months ago
It's one of my small tooth on the left side. But felt like the muscle/nerve lining with that tooth really hurt along my face. The muscle next to and under my nose on the left side is so tender. Did the root canal help at all?

it should start getting better i had one too they really hurt , the antibiotics take around 24 / 48 hours to really start working