I agree with Supernova, they seem to be reactions to triggers.

Or it is possible you are looking for some thing that is really not there. Everyone has some up's and downs all day. Most are able to handle those like shock absorbers for cars.

Please don't take what I say as a diagnosis, but I would speak to your pdoc about this as it does sound more like borderline, but it can be bipolar and your just over focused on your moods right now.

Good luck to you!