kparamsothy,
First off, welcome to the forum!
If you got a ticket, then:
1. File it with "Option 3" AND "Officer present" both checked off, read over www.ticketcombat.com
2. Wait for court date
3. File for disclosure
4. Post back here when you receive disclosure, or not receive it after 8 weeks after you filed for it
5. Post here a month before court date.
If you got summons, then you need to go to court on the appointed date to see what you were charged with. Usually more serious offences.
Now, "Careless Driving" is a major charge, which might cause your insurer to drop you. In that case you will need to go to a special insurers who specialize in "High-risk" drivers, and thus causing insurance to more or less double. You might want to consider legal help here. We have a free, no-obligation paralegal quote form on the bottom of the site you can fill out.