The best way to tell when you're ovulating would be to use opks. I've never personally used them, but from what I understand about them is you get a positive on them when you're about to ovulate so you can have intercourse accordingly. You also said you're not getting a period? If so, it's possible you're also not ovulating. A doctor would be able to tell you I'd you are or not and if you're not, could give you medicine to help your body.
Hmmm sounds like you could be ovulating.. The ovulation discharge is clear and resembles egg whites and is stretchy.
What color was the discharge?