Help me with a big leak in my game

[jlp_2908]

Im pretty new, but i have been showing a consistent profit on cash tables and tourny tables.
This post is concerning the cash tables, where I have found out where i lose MOST of my stack(sometimes as much as a buy-in but I usually win it all back....slowly). I have kept from goin on tilt Im pretty good like that.
My leak is when I get two pair or trips on the flop.
So, as usual, I bet aggressivly just as I would if I had top pair or whatever. It seems, when I have top pair or semi-bluff, everyone usually folds then, or on a later street. Oddly enough, when I have trips or two pair I get ALOT of action, even with no flush or straight drawy in sight, which should be good, right? Nope. I have only won maybe 2 out of 5 of them. It seems when I flop trips someone flops a HIGHER set, and when I flop two pair someone flops TRIPS.
I find these really hard to read cause trips are concealed especially when you have them yourself.(what are the odds of someone flopping a higher set????????)
So I need help with this leak, i bet aggressively and usually end up betting most of my stack. Should I be raising my low pocket pair more often? (8,8 etc) I dunno, how do you get a good read on these type of plays?