PokerStars No-Limit Hold'em, $0.05 BB (8 handed) Poker-Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

SB ($9.88)
BB ($3.60)
UTG ($4.41)
Hero ($7.50)
MP1 ($9.83)
MP2 ($4.95)
CO ($6.37)
Button ($9.98)

Preflop: Hero is UTG+1 with 7, 7.
1 fold, Hero calls $0.05, 1 fold, MP2 raises to $0.25, 4 folds, Hero calls $0.20.

Flop: ($0.57) 6, 4, Q (2 players)
Hero checks, MP2 checks.

Turn: ($0.57) 7 (2 players)
Hero bets $0.5, MP2 raises to $1.5, Hero scratches his head and ???

No read on villain. I am very confused here. What should I do?