Scenario is really simple, so no hand history.

- There's a lot of limpers and I'm last to act.

- I have TT, I raise 3x BB

- There's 2 re-raises then someone goes all in

- I join all in as the second person, thinking I may be up against AKs.

Finally there's 3 people all in including me. The other 2 have KK and AA, and I'm beaten.

At which point exactly did I make a mistake? Should I have dropped after the first raise (I think it was 6-7x BB)? Or was it just bad luck?

If I had just limped in, I would've been up against 7 opponents or even 8 so I thought the raise was correct. Neither the KK nor the AA guy raised preflop, which is probably what confuses me most!

if two people reraised you, you should have folded.

Ok thanks, that's what I thought too. I'm just wondering why the KK and AA holders weren't raising the first round with so many limpers (esp the AA guy before me)

Well, first off if you're trying to thin the field with your TT before the flop with 7 or 8 limpers in front of you, you need to raise more than 3x the big blind... all the limpers obviously already have 1 BB in the pot, and for every limper that calls your small raise, the next person is getting even more irresistable pot odds which forces them to call with any 2 cards. I'm not sure of the exact numbers but your TT is definately an underdog in a multiway pot after the flop, as any overcard is likely to hit at least 1 person. My suggested play here would be to just check preflop, with so many limpers already in the pot (you didn't mention how many) you're likely to be getting the correct odds to play the hand for it's true value - hitting a set on the flop, and the situation that actually occurred in the hand you played (the worst possible scenario, all-in reraises back to you, you HAVE to know you're beaten and a huge underdog) has no chance of occurring. If the flop comes all undercards, with little straight and flush draws, then you have reason to assume that your hand has a chance of still being good, and you can continue making plays, but aside from those 2 scenarios (hitting a set or a low, friendly looking flop) i would pretty much be done with this hand, without having to try and make tough all in decisions.

indeed strange that neither KK and AA didnt raise. But at the stakes you are playing they are probably hoping to get someone to raise and then reraise allin.

I agree with girevik, you can check or you must make a pot sized raise. If you get one reraise you can call and most of the times that person will have AK - ish. But two reraises and then a allin raise you can't call.

Without a HH or reads or anything I would say

-You didn't raise enough

-I would most likely fold (although I don't know the situation, so my advice is pretty useless and it is pretty useless to comment on this hand)