I'm watching your schematic run in Falstad's. I guess S1 is the lefthand switch? As far as I can tell, it creates boost converter action.
Here are some tips:
The leftmost diode is unnecessary.
I recommend that you add several scope traces. Look at Ampere waveforms through inductor, switch, righthand diode.
Put 1k ohm resistors across diodes. This reduces false unwanted oscillations at each closing of the switch.
Put 0.1 ohm resistors inline with the capacitors. This reduces instantaneous high current spikes.
For your component values I recommend a timestep of 50n. This makes the waveforms more readable. The simulation pauses less. Do not use the default setting of 5u.