Your system - if not dead - is working under the usual FM band. I suspect about 50MHz. Change C1 and C2 to 5pF and experiment with smaller coil, say 5 or 6 turns. It shoud be easy to cut off one turn at a time from the middle and solder the ends. Coil wire should be without insulation and half to one millimeter thick. Be sure that all RF parts are in smaller area than 5cm x 5cm with minimal wire lengths. Your audio amp seems overly complex. Usually one transistor, 2 resistors and 2 capacitors are enough.
Add a 330pF capacitor in parallel with R1 if you already haven't rf decoupling. Essentially this is already suggested in comments (=rf bypass by user Bruce Abbott).
Do not even think this to work if it's built onto a breadboard. See, how tightly 100MHz circuits are in radio receivers to keep parasitic capacitances and inductances low enough. It means = not an extra cm of wire anywhere.