Torn Bicep

I have torn a bicep muscle ,it didn’t come right off,but a few fibres come off. So it is still attached.I did this back in late Oct it is Feb now and it is still weak and sore.I went to physio and had active release done,they said it would be about 13 weeks before it would feel better.I want to start working it a little harder,but it still sore when I push it.My qustion is,would some type of steriod help to speed up the repair, will Deca work or what.I have seen the pros recover from the same thing. About how long does this kind of injury take to heal? Is there anything I can do? Thanks, Shoop