Not sure I agree about the medication at this point, as you're still functioning, you're just not happy about it. The fact it happens right before your period is significant; it could be hormonal. It could be the stress around you that you need to learn how to deal with better. Anxiety or depression medication won't fix any of that, it'll only medicate it. I'd try seeing a doctor first, then if nothing physiological is found you might try seeing someone in the holistic profession to see if you can balance your hormones. The best hormone testing is done by holistic nutritionists, not physicians, because they test you over time. And I'd get into some sort of counseling to learn how to deal better with the stress, because stress will always be there. If it's not one thing, it's another, that's just the way life is.
Have to agree, more or less, with Brian. You need to see your doctor again about both the anxiety and possible depression. If you are under more stress than the average teenager, and IF you DO have these conditions, the sooner you get the help you need, the sooner life will become less of a battle for you.
I think you should be concerned to a point, and that point is that left untreated, either with meds and therapy or a combination of both, they are only going to get worse and become much more difficult to deal with.
You sound like an intelligent young woman, so use that intelligence to seek the help you need.
I wish you the best.
Peace
Greenlydia
It just sounds like the depression. I would get with a doctor about medication or look into some therapy.