What could be causing the ringing in my ear, and will it resolve on its own?!

What could be causing the ringing in my ear, and will it resolve on its own?

A few things could be causing this, and I'm not sure if I should be concerned or not. It started last night, and when I woke up in the middle of the night it was still ringing, as well as this morning. Getting a Doctor to check this out isn't an option due to lack of insurance, lack of local audiologist, etc
.
1.) About a month ago I was involved in a car accident, and I read that whiplash can cause ringing in the ears, plus I was given 300 mg of Ibuprophen. I woke up with the ringing about a week and a half after the accident, but it cleared up later that morning.
2.) I was given a perscription for flagyl for a bacterial infection I had, and then after I finished that, a week later came down with a sinus infection and was given azythromycin. I also read that antibiotics can cause this ringing, and it's not often I take 2 courses of antibiotics back-to-back.
3.) Probably not likely, but on Saturday I got my second hole in my ears peirced. The lobe, not anything else.

1 month ago
4.) I have polycystic ovarian syndrome, and am on birth control and spironalactione as a diuretic. I read also about how these can cause it.
5.) Friday night I was out with a friend and we went to a club and when we left, our hearing was a little fuzzy. I haven't had that since middle school as this was the first time I'd ever been to a club, and the first time I'd been around loud music like that since like, 8th grade (I'm 23).

Is it most likely a combination of all of these things, and should I be worried?

Tinnutis, or ringing in the ears can mean a variety of things. It could result as a side effect of a particular medication, it can signal infection or fluid behind the eardrum in the middle ear, an inner ear problem, or hearing loss due to age, exposure to noise, ect. Illness such as a cold or sinusitis can cause ringing as well. Constant ringing can be annoying, and in some cases it can interfere with hearing, but many people ignore it. If the ringing comes on suddenly, is extremely loud, then it is a good idea to get a hearing test and exam from an ear, nose and throat specialist. Unfortunately, this is not cheap, esp for those without medical insurance. Hopefully this is only temporary and you have nothing to worry about.