GREAT news on clean scans! That is a huge milestone!
As for sleep, I took Benydryl for a while after dx, just too anxious to sleep. Chemo messes with the sleep cycle of the brain, and insomnia is common...many of us used ambien to help during chemo. I loved my ambien and it worked like a charm, never slept better. I still take it on occasion now.
A lot of us will agree, the anxiety of the first unknown chemo can be worse than the tx itself....just get through the first one and it should be much easier. For me, I did AC, and had a relatively easy time. All of us had very different responses to chemo, some easy and some tough, most somewhere in the middle. My advice is to not suffer silently...if you have any unpleasant side effects, tell your doc, and they can treat it. There are about 5 dozen symptoms we all experienced, but you will probably only have a few of them.