Hi Mike,
Yes - I am with the others and would definitely go back and have the immunotherapy.
It is really understandable to have panic attacks about it and for those people who have had panic attacks, well they can be as scary as anything. In fact, one of my big worries is that when I get stung again one day - gulp - there will be no problem with an allergic response, but rather one big panic attack. And there is a remarkable similarity between anaphylaxis and early stage panic attack too. However, I have no reservations whatsoever about urging you to continue your treatment by starting over at lower doses and doing it weekly as recommended. You should not miss out weeks during the build up phase and if you do the venom manufacturer advise you to reduce the dose.
So, give it another go and you have a really good chance of sorting out this problem.
Best wishes
David