I am sure the shock is overwhelming. My advice is one day at a time. Your feelings are normal and do not feel bad about them. A friend of mine had the same exact thing happen to her with DE and she is now 28 weeks.
She was very apprehensive, had so many misgivings, afraid she'd have to consider options she wasn't ready for and then there was the cost of multiples.
Get yourself a good high risk doctor who will follow you closely. Follow diet closely and do whatever it takes.
Good luck and blessings