The man who 'saved' what I have for a voice was named Julio Barocol (sp?) many decades ago in NYC. Three visits to him and I did the things he said to do. You NEED/MUST see a voice specialist. It may be a combination of two things--allergy/improper technique. However, after the allergy has been ruled out or treated then you still come back to seeing a laryngologist. People have given you excellent advice imo, and it would be foolish to ignore that advice. Also, become a member at Mudcat even if only to speak with Kendall by Personal Message. Likely the best North American story teller (with no offense to Utah), outrageously witty, ugly as a sack of hammers and the best timing in the singing business. And he has lost his voice (after doing everything possible to keep it). If anyone could hammer home why y'oughta take care of your throat, he could.

Please note that everyone--and there are more than a few centuries of experienced people writing on this thread--has given the same advice. Please don't ignore them, Alex.

One last thing: I understand the panic you are in. I was in a similar boat a few months ago: vocal strain, voice cracking at the high end and breaking in unlikely spots. I was able to go back to fundamentals and those lessons from Julio in NYC. I'm telling you this because I know the panic you are likely experiencing. See the docs and see the voice coach.

Bruce