I don't have an in-depth understanding of Odds

I've been lurking here for awhile...

Anyway, I guess I don't have a great mind for math so I tend to play based on general concepts. I have a difficult time figuring pot odds and knowing whether I should call certain bets post flop if I am chasing a draw of some sort.
I tend to play more based on generalities, such as, there are four people in the pot and I am on a flush draw, the betting is relatively low, I will chase. Or, there is only one other guy and he made a big raise, I'll lay it down with only 1 card to come and 4 outs. However, again, I dont necessarily do the math and could be missing opportunities and making mistakes.

But I dont (or cant) seem to accurately figure out the pot odds and so forth.

How big of a problem is not knowing odds and probabilities for a poker player?