welcome mf! Glad you're here. Things WILL get better - I had all the same problems with withdrawal. The only one that didn't go away after a few days was the insomnia. It took a couple weeks to get a full, restful sleep. But it's different for everyone, so if you need help during this initial stage, it's best to see a doctor.
Otherwise, keep reading and posting. This is a great place and has been a real lifeline for me!