Unfortunately, you will have anxiety until you get tested within the appropriate times. Get a 4th gen test at 6-8 weeks for peace of mind and another at 3 months for conclusive result. From my experience, nothing else can help you move on. For now, try to cope with the anxiety as best as you can. Stay safe and good luck.
I had an exposure on Dec 29 the symptoms started on Jan 9. These headaches won't go away. Sometimes I get a stiff neck and I have a pain under my armpit.