You are going to want to put at least one picture up in this thread to have even a remote chance of someone being able to help you.
Update to expand on gregma's post which was definitely a good guess:
Are you talking about your laser looks something like this:
or
If so then you should have something like this on the front of your laser perhaps:
If you have what the finger is pointing at, then unscrew it counter-clockwise:
Now that you removed the diffraction grating if that is what was going on, you should now have a single dot. I keep mine screwed in when I am not using the laser as an aperture cover to help protect the lens and keep dust out. :beer:
Was it like that right from the first time you used it?
Where are you at as that can help members help you.
Please add your location to your profile.
BTW welcome to the forum and you should really do an intro post on the welcome page.