What to do?

Don't know why, my heart's pumping non-stop for this few days.

My hands and legs are in cold condition even though the weather now is hot.

I feel very nervous all the time and I don't know what to do.

I had never got this feeling before.

It's going to drive me crazy.

What should I do so that I won't feel so nervous?
There's one week time more.

I can't be so nervous all the time.

If not, I guess I will ruin everything up.

I don't want that to be happen.

What should I do to make myself calm down and not so nervous?

I feel very helpless now.

T.T