Welcome to healingwell. I hope you are able to find the support that you are looking for around here.
I wonder why you are asking if you are bipolar or not when you previously stated that you were diagnosed 4-5 years ago? What type of doctor diagnosed you? A psychiatrist is the one who should be giving out a diagnosis of that.
It is very common to be going through those mood swings day after day especially if you are not medicated. No butts about it...if you are bipolar you need medications to help put your chemical imbalances back on track. Besides going unmedicated can become very dangerous for you.
Sure most of these medications have side effects but you work those issues out with your pdoc. There are a variety of medications to choose from if one is giving you a hard time.
My advise is to make an appointment to a psychiatrist ASAP. and start to deal with your illness in a healthy way.