The following are common signs of Asperger's and Autism
- Slurred speech.
- Lower motor-functions (Poor coordination, etc).
- An intense obsession.
- Sensitivity to being touched, sounds, lights, etc (Heightened Senses)
There are many more, but these are just the common ones.
What should be done, is you should try an online test, and if you score high on it, consult a psychologist/psychiatrist to be officially diagnosed. If you score low, you still might have the condition and if it bothers you that much, see a psychologist/psychiatrist about it.