Omaha 8 Flop --2 pair

I have been running into a situation where I have a nice hand and flop 2 pair. This is a situation where I often make a bad decision by folding when I should have stayed or vice versa. With A-3-J-8 the flop comes A-4-8. I usually make the decision that there will be a low hand, so hoping to hit another A or 8 is playing only half the pot at best, with a small chance to hit cards for a low. A lot of times when I fold a hand like this, the card I needed shows up. When I try to stick it out, of course it doesn't. Is there a standard rule for this or a best way to play hands like this? I have not seen a lot of material on playing these kinds of flops.

Thanks.