NL25 A9s - top two pair in tough spot

NL Holdem 0.25(BB)
BTN ($30.66) [VPIP: 46.2% | PFR: 30.8% | AGG: 10% | Flop Agg: 0% | Turn Agg: 0% | River Agg: 33.3% | 3Bet: 0% | 4Bet: 0% | Cold Call: 28.6% | Hands: 13]
HERO ($42.74)
BB ($29.74) [VPIP: 12.5% | PFR: 0% | AGG: 0% | Flop Agg: 0% | Turn Agg: 0% | River Agg: 0% | 3Bet: 0% | 4Bet: 0% | Cold Call: 20% | Hands: 8]
UTG ($51.43) [VPIP: 9.1% | PFR: 9.1% | AGG: 66.7% | Flop Agg: 100% | Turn Agg: 0% | River Agg: 100% | 3Bet: 0% | 4Bet: 0% | Hands: 11]
HJ ($29.47) [VPIP: 50% | PFR: 16.7% | AGG: 25% | Hands: 8]
CO ($42.76) [VPIP: 20% | PFR: 0% | AGG: 0% | Hands: 5]

Dealt to Hero: A♣ 9♣

UTG Raises To $0.50, HJ Folds, CO Folds, BTN Calls $0.50, HERO Calls $0.40, BB Calls $0.25

Hero SPR on Flop: [14.62 effective]
Flop ($2): 2♥ A♦ 9♥
HERO Checks, BB Checks, UTG Bets $1 (Rem. Stack: $49.93), BTN Folds, HERO Raises To $4 (Rem. Stack: $38.24), BB Folds, UTG Calls $3 (Rem. Stack: $46.93)

Turn ($10): 2♥ A♦ 9♥ 3♦
HERO Bets $7.50 (Rem. Stack: $30.74), UTG Calls $7.50 (Rem. Stack: $39.43)

River ($25): 2♥ A♦ 9♥ 3♦ 4♦
HERO ? ? ?

Preflop: BTN seemed a bit fishy, A9s should have some potential postflop, so I completed.

Flop: got top two pair, decided to x/r in order to charge Ax and not give the draws free cards.

Turn: only 54s got there, other than that I should be good. I think if he has a set, he should most likely raise it somewhere here, though 22 might be afraid of 99, and AA/99 are just one combo each.

River: That's a pretty bad card for me. Not only 54s has a str8 now, but Ah5h and 6h5h as well. Backdoor flush also got there (Kd9d, Qd9d, Jd9d, Td9d, 9d8d, maybe 8d7d or JdTd that had backdoor FD+backdoor str8).

On the other hand, I beat all AJ+, A2s, Ah3h and Ah4h.

What is my best move here with 123 bb lef into a 100 bb pot?

1. Jam - I think this one doesn't make sense at all, as not enough worse hands can call me here
2. Bet/fold for 1/3 - only if we think he will call with AK and at least some AQ

Equity Win Tie
MP2 51.92% 50.00% 1.92% Ac9c
MP3 48.08% 46.15% 1.92% 22, AQs+, A9s, A2s, JdTd, Kd9d, Qd9d, Jd9d, Td9d, 9d8d, Ah5h, 6h5h, Ah4h, 5d4d, 5h4h, Ah3h, AKo

3. Check/call - I am not sure we have that ~~ 39% equity here. Most of his missed FDs are Ax that have SD value. Only ones that could potentially be turned into a bluff that I see are:
- JhTh, 8h7h with BD str8 draw
- I did assume 22 in his range, but no other sets

Equity Win Tie
MP2 28.95% 26.32% 2.63% Ac9c
MP3 71.05% 68.42% 2.63% 22, A9s, A2s, JdTd, JhTh, Kd9d, Qd9d, Jd9d, Td9d, 9d8d, 8d7d, 8h7h, Ah5h, 6h5h, Ah4h, 5d4d, 5h4h, Ah3h

Without 22 it's still 34.38%, not enough.

4. Check/fold - seems quite nitty