Villain is unknown.

This was around my 7th hand at table and I was getting hit with the deck pretty hard. My past 4 consecutive hands were JJ, AQs, AKs, KQo and now KK. I was raising/3betting/cbetting a lot and probably come across as a bit of a maniac.

PokerStars - $0.05 NL (6 max) - Holdem - 5 players
Hand converted by PokerTracker 4

BB: $5.84
UTG: $4.44
CO: $1.13
BTN: $5.07
Hero (SB): $5.27

Hero posts SB $0.02, BB posts BB $0.05

Pre Flop: (pot: $0.07) Hero has K K

UTG calls $0.05, fold, fold, Hero raises to $0.20, fold, UTG calls $0.15

Flop: ($0.45, 2 players) 8 7 7
Hero bets $0.30, UTG calls $0.30

Turn: ($1.05, 2 players) 6
Hero bets $0.75, UTG raises to $1.50, Hero raises to $2.75, UTG raises to $3.94 and is all-in, Hero calls $1.19

I felt villain could easily be playing back at me but has he waited for a hand to do it? He l/c so he could easily have hands like A7 or 66/88 maybe even T9o. Obviously once I 3bet villain and he 4bet shoves I am committed but I'm just not very happy about it.

On the other hand there are also plenty of hands that I beat and villain could be playing back with a draw or just not crediting me with a hand and not willing to lay down something like AK/AQ...

Thoughts?