Raise bigger preflop to get a few limpers out. Online you can use the 3bb + 1bb per limper, but live you're going to have to raise bigger. With a hand like QQ you could make it 20$ for extra value and STILL get two callers.
Don't assume they're bluffing postflop. If they donk a board like that, you can assume it's TP+. If they bet a flush draw, then they're still going to have a lot of equity vs you and you're going to pay off two big bets on the turn and river without knowing whether you're still ahead or not. Folding is perfectly fine.
Raising is pointless: no better hands are folding, no worse hands (except flush draws) are calling.