Hi and welcome.
It does sound like bp but only a pdoc can really give you the answer you seek.
I was only dx'd the end of june .Since being on lithium I am MUCH more stable than I ever have been.Im still going through changes in dosage so its not perfect but def better.
After my dx....I realized how many obvious symptoms of the disorder I had.The one thing that comforts me is that I know that its not my fault ,that I cant control my moods.I can understand them however,and possibly prevent them from getting out of control.
keep posting.....good luck