Hi there

I have a problem with my car. Three months ago I was driving with very low gas, and a few feet away from the gas station the car started shaking a lot whenever I pressed the break pedal. The car also wouldn't go faster than 20 mi/h even if I pressed the gas pedal. After putting gas on the car the problem persisted.
The car wouldn't shake if pressed the gas pedal, but it wouldn't go past 20mi/h.
I had just replaced the battery and given it an oil service and tune up.
Since the incident I didn't use the car at all, so now it won't start, probably is because I haven't turned it on ever since.

What do you think the problem might be? Would it be the fuel pump?

Thanks a lot!