I'm three days late on my period an I'm spottin an crampin

Sounds like PMS, but have you taken a test to be sure?

No cause I started spottin I spoted yesterday real real light an stop then started today spottin

Give another day then do a test. If you are not pregnant then it might be because you have changed your diet.
If that's not the case. See your GP. He or she should be able to help you.

It's not unusual for periods to be off a bit. As was said, give it a few more days and see what happens. Test if necessary.