I'm sorry to say, but it sounds all normal to me. I am the proud mother of 8-yr-old twin boys and my entire pregnancy was pretty miserable. I think it was because they are fraternal and there were two placentas - meaning that many more baby hormones surging through my body. This may be the case with you.
My advice:
First, talk to your OB and make sure everything is fine.
Second, find your local Mothers of Twins Club. If you live in Orlando, they meet at Florida Hospital. They are a great resource for any new mother of multiples. You can probably find someone in that group that would be a wonderful sympathetic ear when you feel frustrated and unsure.
Finally, you can do this. You are so much stronger than you think. Remember, God wouldn't give you any task that you couldn't handle.
I wish you the best of luck. Twins are the best.