Also! One last thing; If they are not getting back in touch with you, call your insurance (if you have it) and ask for a list of psychologists/therapists accepting new patients. :) If you don't have insurance, you can Google therapists in your area and see what their specialties are! Most therapists are well-versed in treating anxiety.
What you're dealing with is called "intrusive thoughts." (I had these when withdrawing from a medication, so I learned a bit about them from my therapist.) As crazy as it sounds, the fact that they're upsetting you is a good sign, because it means your rational mind is intact. As far as the thoughts go, they can TOTALLY be a byproduct of anxiety. Some people with anxiety - depending on the type of anxiety - do get intrusive thoughts of that nature (hurting themselves/others) and some of them get intrusive thoughts that are very much "what if something bad happens to me?" I get the second type, the what ifs, but it sounds like you're dealing with both. I'm so sorry! CBT can be really helpful in learning how to cope with these. In short; no, you're not going crazy and yes, it's JUST anxiety! I hope you hear back from the therapist(s) soon