No exactly the opposite. Any active ciruitry such as switching regulator needs about a thousand times more power to operate than what you have available. You need a completely passive solution with as little leakage as possible. Stick with a single low leakage diode as a rectifier, and a second zener diode to clamp the voltage. Fedd the result into a very low leakage capacitor.
I have no idea what are you trying to power, but I dont think your source will be able to power anything. Can you give more details about what is that mysterious power source and what you are trying to do with it?
Source is a Vibrational based Energy harvester . and my load will some kind of sensor ( not sure ).