It is not necessarily too late, but you did create a potentially big problem. At this point, assuming you report to your now former Employer what really happened before 30 days from 2/28, the issue is going to be your credibility. If the Carrier believes your story, and they have no other defenses to raise, then "no harm, no foul," and they should pick up the accident and start paying benefits. If, on the other hand, someone decides your story is shady, they might deny benefits and force you to engage an attorney to prosecute a formal claim before the Judge of Compensation Claims. Again, assuming no other defenses (e.g., pre-existing conditions), the issue before the JCC will also be your credibility. Best thing for you to do would be to go see an experienced W/C attorney in your area a.s.a.p. to find out in detail what your options are, bcz the clock is ticking against you.
No, it is not too late. Under Florida Law, you have 30 days to report to your Employer from the date of accident. I strongly recommend that you report the injury to your Employer immediately and explain why you indicated that it was not work related. Certainly, this could cause you some problems down the road, and your credibility might be questioned, but a legitimate explanation at this point could save you that trouble. You should consider consulting a workers' compensation lawyer in your area if you get resistance from your Employer or their workers' compensation carrier after reporting.
I would make sure you put your request for workers compensation benefits in writing. Since you are no longer working for the company the employer might try to say your never timely reported the accident. Fax or email your request so as to leave a paper trail demonstrating timely notice of the injury within 30 days of the days of accident.
Chadwick J. Lawrence, Esq. Orlando, Stuart and Tampa Av rated by Martindale-Hubble, Superb AVVO