Flush strength, and calling beyond Pot Odds

You have suited cards and call to the flop; The two situations I find most for myself are:
Axs or SC.

Now the problem arrises when you flop your 4 flush but pair nothing on the board nor a straight draw. If you are heads up, and someone bets the pot, he is providing you 2:1 odds for a call right? With the nut flush, would you call for a turn card? And if it doesn't hit and your opponent puts you on a fluah draw, he should now at least bet the pot or more on the turn to make calling for one card to come to hit a flush a bad move.

What about a low flush draw? This is where I really have problems recognizing if I am ahead or not. My approach is to call an all-in or go all in if I hit the nut flush(If I think my opponent will call), but a low flush I never call an all in. I always have the dreaded feeling that someone is going to out flush me half the time.

So the two real questions are for flush draws are:
1) Is it right to call a bet for a turn or river card that is not giving you odds to call for one card? Because if you call that overbet and hit the turn with Axs, you have a chance to bust someone out. Especialy if he had a set on the flop.

2) How far should you go when you hit a lower suited flush, say any suited conector T9s and below.

(Note: I am also assuming that you did not flop a straight draw (gut or Open) for your SC either. Normaly if I have it both ways for a straight and flush I stay in the pot, half the time betting it out to build it)

If your opponent bets the pot, you have to be pretty sure that you can get some more money out of him if you hit. Still, when a player bets the pot he's often protecting his hand. The third card of a suit in this spot is a major scare card and I find it quite hard to get paid off.

Flushes are quite obvius, as opposed to straights. I would recommend calling only when you get proper odds for it. (But if you think you WILL get payed off, by all means, go for it.) What stakes do you play?

I feel like I've saved a lot of money by stopping limping Axs, especially out of position. It's also easy to his an ace and donate some money to a bigger kicker. Suited connectors can be great in the right spots (late position, cheap flop, multiway pot).

if your scared of the higehr flush then dont be, it wont happen often. But take care to try and read other opponents in a multi way pot to put them on one, then you may need to fold.
Otherwise dont play any connectors lower than 87 say. Then you give yourself a safey margin dont you?
HU if you can win a pot without going bust on a draw, id go for it