Clueless about what to do!

[OmahaGrinder]

***** Hand History for Game 5597881326 *****
$25 PL Omaha - Friday, January 19, 15:21:46 ET 2007
Table Table 126573 (No DP) (Real Money)
Seat 3 is the button
Total number of players : 9
Seat 5: UBCMAN ( $33.12 )
Seat 6: IEAIAIO_ ( $41.40 )
Seat 8: dark21 ( $20.03 )
Seat 10: Ayrefik ( $57.95 )
Seat 3: betmaxbluffriver ( $22.70 )
Seat 9: Ruuhkatukka ( $25 )
Seat 1: cunnyhoney ( $27.40 )
Seat 7: da_lance ( $5.75 )
Seat 4: zarathastra1 ( $4.50 )
zarathastra1 posts small blind [$0.10].
UBCMAN posts big blind [$0.25].
** Dealing down cards **
Dealt to betmaxbluffriver [ As 7h Qc Qh ]
IEAIAIO_ calls [$0.25]
>You have options at Table 127272 (No DP) Table!.
>You have options at Table 126414 (No DP) Table!.
>You have options at Table 127272 (No DP) Table!.
da_lance calls [$0.25]
Ruuhkatukka folds
Ayrefik raises [$1.35]
>You have options at Table 127272 (No DP) Table!.
cunnyhoney folds
MVX66 has joined the table.
betmaxbluffriver calls [$1.35]
zarathastra1 folds
UBCMAN calls [$1.10]
IEAIAIO_ calls [$1.10]
da_lance folds
** Dealing Flop ** [ 6d, Ah, Qd ]
UBCMAN checks
>You have options at Table 127272 (No DP) Table!.
IEAIAIO_ checks
Ayrefik bets [$5.50]
>You have options at Table 127272 (No DP) Table!.
betmaxbluffriver folds
UBCMAN folds
>You have options at Table 126509 (No DP) Table!.
IEAIAIO_ folds
>You have options at Table 127272 (No DP) Table!.
Ayrefik does not show cards.
Ayrefik wins $11
>You have options at Table 127272 (No DP) Table!.

k so I flopped middle set Q's great. But this guy raised PF and insta-bet this flop. Now I know I got an A in my hand so it makes the chances he has AA slimer but it's so easy to put him on AA, and if he doesn't have that he must have outs to the str8 and to a flush. I've never read a omaha poker book so that's wy i'm posting here. How often should I be letting middle set go?> I worry about top set when I have middle set alot when he was PF raiser. Can you just directly tell me some advice or link me somewhere with some good info on sets. Thanks!