It's a complex question. Your explanation is brief so my response may not hit the mark or answer what you're looking for.

Are you questioning whether or not you have bipolar? If that is the case could you see a mental health practitioner for a screening? Not sure anyone here can give a definitive answer.

I don't think bipolar is the only disorder - I agree with the above poster that depression is too. This is in response to the word "mood disorder". There are many different diagnosis that can cause irritability. Were you stating that you're on a mood stabilizer or merely stating antiantileptics can stabilize moods? There are many disorders that can change our sense of stability. It depends really whether or not you meet the diagnostic criteria. Feeling irritability is not enough to go by.

What other symtoms are bothering you?