Dear dolphin01,
Reiki attunement can have side effects that newbies often don't hear about. Attunement often brings up healing issues that one has been 'back burner-ing', ignoring completely or managing just enough to get by in life prior to Reiki.
Anxiety is buggering thing. I know it's hard. It's like the very pent energy of it makes one want to chase away the most very healing force : grounding mind / body relaxation.
The last thing pent nervous energy wants to do is relax. It's afraid to relax because then it will cease to exists. You can start seeing it as not being you but a small cog in the greater architecture that is you. After that it becomes easier to see it for what it is and begin to let it go. It usually takes some emotional work to get there.
I know it's hard to do relaxing practice when one's inner energy is at such high idle rate. But I would revisit those efforts. I would highly suggest finding an easy yoga class that focuses on breathing and relaxation. There are easy yoga poses that are very effective at clearing ungrounded nervous energy so the breathing and mediation practice work soo much better.
Namaste,
Michael
