Volume down button broken, so there is no fastboot topic

Hi, my volume down button is broken, and I'm just wondering if there are any way to get into fastboot without hardware buttons... I was flashing through fastboot and I made some mistakes in the process, so basicly I have no S. O.
When I turn on the phone, it goes straight to recovery mode, but I'm not able to choose any other option, because my volume button is broken :(
Is there any solution or workaround to get into fastboot? Is to hard to repair the volume buttons? Thanks in advance...