Lost my confidence. 2 hands

[emptypockets]

Two questions. Probably easy to answer. Please comment my play, flame me and laugh at me as well if you want to.

Party MTT 10,000 guaranteed.

Hand 1:
Blinds 150/300

I have $5500 which is a little above the average stack.
I get [ Ad Ks ] in EP and raise to $900.
Folded to SB, $9000, who calls.

Flop comes [ 7s, Tc, 5h ]

Villain checks.
I make a continuation bet of $750.
Villain raises $3500.
I fold.

Should I have bet more or just checked here?


Hand 2:


Level 6 Stakes 150/300

I´m a little short stacked with $3500, big stack at the table has $16000
and four players are around my stacksize.

I get [Ad Qh] under the gun.

I minraise $300. Folded to SB, with $1430, who raises an additional $375.
I call so I won´t be totally committed if the flop looks too scary.

Flop comes [ Jd, Qs, 5h ]

Villain bets $150. I call because a minraise on the flop after a reraise preflop seems
suspicious. What would the shortstack do here if the flop totally missed him?

Turn is [ 9s ]

Villain checks.
I raise $300. I don´t think the turnplay is all that wrong, but should I have reraised on the flop?

River is [ Ts ]

Villain pushes in his last $230.
I call.