First off, are you doing 25-i or 25-c acid?
25-i is the normal acid, take this for your first time, and only take 1 blotter tab. 25-c is harder (taking 1 of 25-c is like 3 25-i's). I wouldn't do 25-c for your first time...
Secondly, please only take acid if you're having a good day and / or in a good mood, don't take it if you are going anywhere in public for the next 8 hours, (usually a trip lasts about 12 hours). Stay at home.
Also, I don't know if this is just me or not, but if you're getting freaked out by your vision - if it's too wavy or crazy, play some sort of movie on a tv or computer screen, I did this and my vision re-adjusted for the time being (as soon as I looked away it was back to all trippyness).
Be careful with this stuff....unlike weed, Acid really does fuck your brain up after a while.