5/10 Learning When To Fold - JJ under pressure

I'm still learning when to fold. I'm finding these decisions are getting easier, but these two made my doubt my play. How do you think I played every street, and if I played wrong, how close were my decisions? Seek is 65/7/1.7 and does fold to flop bets every now and then. Vik is 40/8/1.7 and is pretty solid with his pfr.

HAND 1 5/10 Pacific:
Preflop: I'm on the button with JJ (5 handed)
Vik(UTG) calls, CO raises, I 3-bet, SB folds, Seek(BB)/Vik/CO calls

Flop: Q 5 2 rainbow
checked to me, I bet, all call

Turn (8BB): 6 with heart draw
Seek donks, Vik calls, and I call

I'm thinking of folding as my hand may not be good enough against an overcall. I'm getting 5.5:1 on my money. My gut says call and see what happens on the river, I have position.

River: 7
Seek bets, Vik calls, I ???


HAND 2: This next hand happend a couple hands latter

Preflop: I'm in SB with JJ (6 handed)
Seek (UTG) calls, 2 folds, button calls, I raise, BB/Seek/button calls

Flop: 9 9 A rainbow
I bet, BB folds, Seek raises, button folds, I call

Turn (6BB): 5 with two spades
I check/call with 4:1 effective odds on the call down
I see this as a good place to call down a somewhat aggressive bettor.

River: 3
I check/call

Trent.