overwhelmed, doesn't necessarily mean excitement or happiness, it means that there are loads of mixed emotions playing with your head, blocking down your throat that you can barley utter a word. It means losing yourself into a greater emotion that sweeps you off your feet, and, sometimes, gloom your beautiful soul,it means your hardly in control of your emotions that you used to handle like a pro. 
But sometimes, sometimes you're just overwhelmed and anguish, your bothered and annoyed. sometimes yo're tired of you're favorite pizza, analyzing your feelings over ice cream and justifying them. it just overpowers you and take you out of the blue..
so when these moments arrive..when you're overwhelmed and overpowered, just sit down outside at night ....gaze at the beautiful sky....look at the moon....look at the starts..contemplate our large universe..and how tiny and small you are..that you are sharing this world with seven billion other creations just like you who are busy with their own troubles...and remember that no one gives a shit,so get over yourself... and remember we magnify our feelings and create our own agony...its easier to feel sad and down always when you contemplate over your own emotions..
just smile..it's a good deed, its Sunnah, and science has proved it will send a positive signals into your mind 's neurotransmitter and trick you into happiness..welcome happiness even if it's a trick instead of dwelling into unnecessary feelings. 
#just smile