Your best bet is to speak with an attorney - one that SPECIALIZES in getting records cleaned up. And do it soon as in most states it can take a while and you will probably have to appear in court to explain yourself and how you are doing now under oath.
I have a problem with the fact that there were THREE felonies, but what you have going for you is that you were 14 and I don't know about FL but many states will take that into HEAVY consideration in deciding to expunge your record.
Your best bet is to go through an attorney; your felony conviction may have come with a standard set of terms - one of them being that you may not ever be in possession of firearms, ammunition, explosives, etc., for the rest of your life.
And this is not something that you want to start messing around with yourself as 3 felonies may equal 3 strikes, right?
Get the information under the table immediately - in other words stop talking about it. And get it under lawyer/client privilege immediately.
It would be interesting to know if this has affected any other aspects of your life such as voting, military service, job opportunities, passport applications, etc., as an indicator of whether or not these felonies were lumped together and buried after a period of time or when you reached the age of majority, or by a parent without your recollection, or whatever.
Regardless, you need to get to an attorney immediately and get this under attorney/client privileged confidentiality.