First of all, thanks a lot for all the responses!
There were a lot of useful tips.
Some things to clear up:
1) As much as I'm sure it would help, I'm not planning on getting an instructor. Even if I was, I'm not in the US so I'm guessing all those suggested are a little too far for me (just an ocean and half a continent away) and I'm sure a little too pricy for me.
2) I do have a PSR which include my chalking before every shot, visualising the angle and the desired result and the practice strokes...
I have noticed tho that the things that work one week doesn't work the next week.
Eg. It was one of those weeks where i couldn't pot a ball. I descovered that if I hold the cue tighter than normal, I was playing decently again. For the rest of the week I played with a tighter grip and everything was fine. After a week or so potting with a tight grip became imposible..
But even if i don't change a single thing, I can't play consistently the entire month.... One day my stroke is dead straight, the next is not, no matter what I do. One week my eyes see the potting angle clearly, the other I can't aim a single shot. There are weeks that I get the feeling that the margin of error on aiming is very big and no matter where I hit the OB (near the potting angle) it will go in the pocket, the other week I feel that the smallest detail can throw the ball out...
It's getting at the point where I'm starting to feel like a woman, in the sence that I seem to go throu "my time of the month"... I sould mark my calendar and avoid playing in tournaments in those weeks.