in the mist of confusion

so lately i have found myself in a weird state.
lately i have been having sudden emotions. like one second i can be reading or studying and out of the blue i start to feel indiferent about everything.
or i can be talking to some friends and feel fine and then all of a sudden i feel sorrow for no reason at all.
also, i have noticed that many times when i am with a big group of people i feel like i am not really there; in other words, i feel like i am really not a part of the scene or context in which i am in. like i am a spectator of a play.
and many times during the day, i just feel lonely.
i have no reason to feel this way: i have very faithful friends and a wonderful family.
since i have always been a introvert at heart, i find it hard and almost impossible to express how i feel to other people, when face to face or talking on the phone (writing it down is easier for me).
i was been diagnosed with clinical depression four or five years ago and i go to the psychiatrist every two months for checkups. she says that i am fine and just need to keep taking my medication. i used to go to tthe psychologists as well until last year when the psychologists said that i was well enough to not need to visit anymore.
so, everyone thinks that i am getting better. i think i am getting better. yet my emotions these past four months have been so weird.
any comments or advice?

Keep yourself busy with friends, family, games, Television shows, adventure books. The mantra is "dont let your mind astray for even a single minute". These things can make you tired at the end of the day and you will have a sound sleep in the night.

Live in present, dont think about past and future

When I have sudden opposite emotions like that I try to track down what I was thinking/what was being discussed or what I was reading and see if there's a reason. I will be happily reading a good book and suddenly find myself in front of the refrigerator for example, so I go back to what I was reading and find it was something that made me think of something that was anxiety producing.

Hi ~ I've been depressed since I was a child, and have been on medications for years & years. I know what you're talking about. I too can be with friends or out with my daughter, and all of a sudden a huge "wash" of depression will go over me for apparently no reason! But what I've found that there IS a reason to it ~ without knowing it, I was thinking of something in my past that hurt ~ such as the death of my husband, or the loss of a family member. I tend to think of these things without even realizing it ~ and then this depression will hit, and I'll wonder what the heck happened! I have to consciously think about it, and then I'll realize what was going on.

And it's not always deaths ~ sometimes is other issues in my past that brought me grief ~ or things that I'm ashamed of or that I had struggled with in therapy. I've tried to put those things behind me, but every now and again, they float back up to the top and pester the daylights out of me. So I have to work once again to get rid of them.

These are just my experiences. I hope I've helped you a little. God bless and take care of YOU. Hugs, Lee