SB- fairly unknown, but very donkish stats thus far. 57/27 fwiw.
BB- unknown.

i think my 4 bet size was a tad too small, but the idea was to isolate without blowing him out. apparently that didnt work out too well, so wtf do i do? can i fold? and the flat call from BB is very odd, and it makes me think he has AK. he doesnt want to let his hand go, but he is very afraid because that is the worst possible flop for AK in a 3 way 4bet pot.

PokerStars No-Limit Hold'em, $2 BB (5 handed) Poker-Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

SB ($91.60)
BB ($201)
UTG ($203)
MP ($289)
Hero ($188)

Preflop: Hero is Button with A, A.
2 folds, Hero raises to $6, SB calls $5, BB raises to $18, Hero raises to $42, SB calls $36, BB calls $24.

Flop: ($126) K, 8, Q (3 players)
SB bets $49.6 (All-In), BB calls $49.60, Hero...........