Just sit down. villain is basically unknown and seemed a donk (not sure), no reads. C/rai or just call ?
PokerStars No-Limit Hold'em, $1.00 BB (8 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

UTG+1 ($100)
MP1 ($112.25)
MP2 ($107.50)
CO ($142.80)
Button ($152)
SB ($161.60)
Hero (BB) ($100)
UTG ($100)

Preflop: Hero is BB with A, A
4 folds, CO calls $1, 2 folds, Hero raises to $5, CO calls $4

Flop: ($10.50) 8, J, 2 (2 players)
Hero bets $7.50, CO raises to $16, Hero calls $8.50

Turn: ($42.50) 8 (2 players)
Hero checks, CO bets $20, Hero ?