As part of our Curricular Practical Training (CPT), I completed my summer internship with a company on 2nd of the September. So the formal procedure for extending the work is to apply again for the new CPT but somehow my second CPT delayed and got approved on 28th of September. Between 3rd and 28th for around three weeks, company asked me to work and I did. At the time I was not aware of the consequences but now I am in a great trouble. What do I do?
You have two choices that I can see: apply for reinstatement or go outside USA and reapply for a visa.