Blood Blister on earlobe?

Back in June or July I got a new piercing in my upper earlobe. It went through the normal routine of infect, hurt, heal, lather_rinse_repeat. However, within the last 2 months or so, it got infected again and nothing I did would make it go away. It felt like it hadn’t healed at all, and after all this time you would think that it would have. I know it isn’t the earring itself, as I made sure it was a gold stud. (im allergic to silver.)

More recently, I noticed a swelled area in the back of the earring so I switched the stud out to my hoop so that I could clean it easier without the hole closing up or getting irritated. The swelled area ended up turning into what -appears- to be a blister of some sort. Its dark in colour, kinda squishy, and looks like it may have pus inside. Several hours online have narrowed it down to one of three things: A standard issue infection, A standard issue blood blister due to irritation, or a cyst.

I went to see a doctor for it. He took a rather fast glance at it, proclaimed it to be infected, and gave me antibiotics for it along with a saline soak. Which would be all well and good if it weren’t for the fact that the pills are giving me such bad heartburn that I haven’t slept more than a few hours in 3 days now. It seriously feels like ill vomit lava if I lay down.

Personally I think the doctor is insane but I don’t have another to go to and this thing freaking hurts. The pills haven’t done a beneficial thing at all and the stupid blister thing keeps getting bigger every day. The saline soak hasn’t done anything short if drying out the skin. Is there anything I can do? If I don’t fix this soon my work is going to start suffering. D: