HEADACHES during/after my swim workouts

Could be due to neck tension.  Make sure your head is in a neutral position..

I get them sometimes if I wear a cap for too long.  Hence, I don't wear swim caps.

A couple thoughts: do you wear glasses, just not in the pool?

As pointed out above, head position makes a big difference--neck tension can be pretty bad if you're off a bit, and that can lead to headaches.  Your eyes shouldn't be looking ahead (at the wall), but instead look diagonally down and slightly in front of you.  It's a lot easier on the neck and shoulders.

Also, are you breathing enough?  Make sure you're expelling enough air when your face is in the water to get a good breath when you turn your head to breathe.

lets see...

no i dont wear glasses/contacts.

my head position might be to blame, it could be a little off axis. i think it might be this plus neck tension just from turning and breathing so much cause i feel it in my neck.

i dont think its the googles too tight but it could very well be.

and i did happen to wear a cap for the first time just try it since i race with one. 

thanks or all the input guys 

I get them a lot more when the pool is too warm.  The pool at my gym was about 85 degrees on a daily basis and it drove me nuts.  I ended up switching to another branch of my gym where the pool was 78-80.  It got rid of about 75% of my headaches, but I still get them now and then.

its so funny because all of these things could be the cause!

im really feeling that it might be a combination of the swim cap and my neck...

 thanks guys!