Hello Chilled, welcome to Psych Central.

It's good you have some awareness that you are having issues with emotions right now. Don't be too quick to diagnose yourself, often a label can make things worse. There is naturally some upheaval at your age, that being said, you mention that you have suffered anxiety in the past and had medication for it. Anxiety can mask many symptoms. Remember that anger is a normal emotion, can you pinpoint any triggers for that? What things set that off? Have a look online for resources for helping you to deal with anger and anxiety.

I recommend that you go back to your doctor about these issues and get to see a therapist. Good luck.