You must be very bored to continue using a drug that you admitted was unpleasant, not sure though.
Maybe ypu rather feel something time consumimg other than sobreity? I can understand, hypnotics are interesting but so are our minds. With some creativity you can achieve hallucinations similar to diphenhydramine, but I digress.
700 mgs for your second time sounds like a bit much, don't you think? Consuming that many will impair your cognition and memory to a point where you'd forget you took the damn pills in the first place leaving you manic and confused. The sedation is also very unpleasant.
I've read enough reports and done it countless times to know it's just terrible recreational wise.
Not to mention the aftermath it leaves your body, especially your heart (even dextromethorphan is easier on your heart) and you only get one.
Basically, I strongly advise against using it.
To each their own though.
Read the evidence yourself:
http://www.erowid.org/experiences/subs/exp_Diphenhydramine.shtml