Okay @KMAC46 First of all I want to say that you've made a stand by voicing your anxiety. Secondly, being terrified is not unusual. I joked (sort of) to my surgeon that the balcony doors of my room were locked so that no-one could escape at the last minute. I was shaking so much in the theatre that while the anaesthetist was working on one arm, the surgeon was holding my other hand. Add to that your existing anxiety and it's no surprise you're feeling like that. Regarding the port, I had one, hated it being there (it gave me the creeps for a long time) but am so grateful that it was as it made chemo so much better and left me with veins. It's a bit strange but you do get used to it.
It sounds like you are doing what you can but you need help to get through this. I understand that with the restrictions you can't have a support person with you but I think it is important for you to speak to a cancer-focused psychologist or counsellor, preferably attached to the hospital and see if you can have someone from the hospital with you during procedures. I think that your doctors need to know this is more than just being a bit scared and that you need to be assisted through it.