Yeah OP, you don't get a tolerance to 7 xanny bars overnight, so you should've seen the writing on the wall IMO...
However, even if 30 mgs of clonazepam isn't doing anything noticeable to you, you could be in a blackout without even knowing on that shit...
Yes, avoid alcohol and opiates like the plague on that kind of dose of benzos...You could easily kill yourself!
I find that benzos only give me a slight glow if I take them occasionally... once I get to the point that I don't even notice 2mgs of xanax, I'm too deep already!
Of course, there's times where 2mgs doesn't seem to affect me....but I've been burned enough times to know that popping more, is a recipe for disaster!