Your usage of this (also known as Benadryl) is alarming. I'm sure you realize you are overdoing it. Diphenhydramine builds up a tolerance and thus you end up using more and more to get the same effect. Whatever you are taking them for, anxiety, sleep, whatever, there are better meds out there, stronger ones, so that you don't need to take such a continual overdose. Let you doc know what trouble you are having so you can getter safer relief. (You'll prabably save money too.) I imagine you could wind up with liver damage otherwise. Ask a pharmacist or doctor about long term damage.
Also, I would recommend considering a 12 step group because this kind of self medicating smacks of addiction or abuse (Yes, even over the counter meds can be abused). Just my opinion. I've been there too (also sleep meds) and lots of people over do it in different ways, but groups are good places for support and hearing how others have struggled and succeeded. You don't have to be addicted or using alcohol or narcotics to attend, any addiction or drug abuse for the purpose of self-medicating qualifies. Good luck and go look for that help.