bb is 14/11/.6

utg+2 is 63/0/.5

PokerStars 0.50/1.00 Hold'em (10 handed) FTR converter on zerodivide.cx

Preflop: Hero is UTG+1 with [Ah], [Ac].
UTG calls, Hero raises, UTG+2 calls, BB calls, UTG calls.

Flop: (16.50 SB) [4s], [8s], [4h] (4 players)
BB checks, UTG checks, Hero bets, UTG+2 calls, BB calls, UTG calls.

Turn: (10.25 BB) [5s] (4 players)
BB checks, UTG bets, UTG calls, Hero ???

You're almost definately losing right now, but you have 4 outs most likely. an Ace or a 4 would be good for you, and you're getting a good enough price to call one more bet on the turn. If you don't fill up on the river then you can let it go, but you are getting the right price to chase a full house.

call now.

call 1 bet on river UI.

BB has KK or QQ, I'm much more afraid of UTG+2 who is loose enough to be playing any too suited cards or trips at this point. With this many villains it may be a fold, but I think I'm probably calling down.