preflop obv he's got a big hand like JJ+, pretty solid player 15/9 over 140 hands. I figured a 5bet would make it obv I had AA, but on that flop I'm thinking afterwards that is scary for me because now I'm only beating KK.

Should I have been more conservative after the flop?

pstove says it's pretty much a flip with a range of JJ+, AKh

PokerStars No-Limit Hold'em, $0.05 BB (6 handed) - PokerStars Converter Tool from FlopTurnRiver.com

saw flop | saw showdown

MP ($1.53)
CO ($5)
Button ($5.12)
SB ($5.32)
Hero (BB) ($6.18)
UTG ($1.94)

Preflop: Hero is BB with A, A
3 folds, Button bets $0.15, 1 fold, Hero raises to $0.35, Button raises to $0.70, Hero calls $0.35

Flop: ($1.42) 7, Q, J (2 players)
Hero checks, Button bets $0.67, Hero raises to $2.10, Button raises to $4.42 (All-In), Hero calls $2.32

Turn: ($10.26) 3 (2 players, 1 all-in)

River: ($10.26) 4 (2 players, 1 all-in)

Total pot: $10.26 | Rake: $0.50

Results below:
Button had K, K (one pair, Kings).
Hero had A, A (one pair, Aces).
Outcome: Hero won $9.76