AM glad you are finally in treatment. Your ENT should have gotten the biopsy report to you much more quickly--something went wrong there, suggests that he/she may not be someone you can rely on (but I do not have all the details I am sure). Fortunately it may well not have a negative impact on the ultimate outcome, as if your diagnosis is SCC BOT,
HPV+, the prognosis is generally thought to be quite positive and the likelihood of there having been any further metastases during the delay is low compared to other cancers.
You are getting a fair amount of cisplatin, and it caries significant risks. You may be getting lower, weekly dosages instead of larger, less frequent doses. If you have not already discussed the risks of the various strategies for using cisplatin I would encourage you to bring this up to your oncologist very soon, as there is the potential for irreversible side effects such as numbness/tingling in extremities or high frequency hearing loss.
Good luck to you. Treatment is a bit*h and will likely beat you up, but we come back with time, and it sure beats cancer.