The issue is that the big pharma companies only test for safety for up to 28 days. Because of this pharmacists usually will not distribute a 5 or 10 ML vial if it is intended to be used for longer than that because its use would be outside the known safety window.
Looking at the Free T number you posted above I would say you could probably reduce your dose a bit...since it is almost double the lab range. Unless that is an age adjusted range...then you would need to know the range they have for a 25 year old and work from that. Just my opinion.