If you told your doctor that you were out of breath after going up the stairs 1 flight, it would be the same answer: You need some tests done. The difference here is that you can buy an ohmmeter for 6$ and do it yourself .... IF you have some electrical knowledge. It would be a stretch to buy that MRI for 600,000$ and set it up in the back yard and get the wife to operate it.
Its all about how much time and ambition you have to learn up to a job. I would check the intake for stoppage, and then call the pro if you are not trained with an ammeter or ohmmeter.
If its a submersible pump and the flow is restricted or not directed across the motor shell, it may overheat and shut off temporarily. You must have an old control box if it has a manual reset.