Opponent was slightly loose slightly aggressive who hasn't done anything caste

$0.1/$0.25 Pot Limit Omaha Hi/Lo
8 players
Converted at

Stacks:
UTG ($23.45)
UTG+1 ($38.60)
MP1 ($26.25)
MP2 ($31.65)
CO ($24.20)
BTN ($34.50)
Hero ($24.15)
BB ($49.90)

Pre-flop: ($0.35, 8 players) Hero is SB [Td][As][Js]
UTG raises to $0.85, 5 folds, Hero calls $0.75, 1 fold

Flop: [8h][9s] ($1.95, 2 players)
Hero checks, UTG bets $0.75, Hero raises to $4.15, UTG calls $3.4

Turn: ($10.25, 2 players)
Hero?


I CRed the flop thinking that I would take it down and his call left me puzzled about what to do on the turn.

I let pot and he raised all in with .

I am always slightly scared when there is a low + a draw that I don't have. In this case I was fairly sure he had either 23 or a heart draw and I was worried about heart draw + garbage low.

Do you guys still lead if
a) If the turn was a ?
b) If you don't have the nut spade draw?