Sooooo...new to drones, flying a P3pro and loving it. However I have had a few (3) barely moving, low altitude (like 1-2ft) "crashes". Nothing to write home about and literally almost no damage besides 2 broken props and a very slight scuff on one arm. However in all cases the props have been obstructed for a few seconds and have made that horrible screaming noise until I've gotten the motors killed. Now I swear the drone has a VERY slight hum/whine that it didn't have before. Is there any way to test or run a diagnostic on the motors? Should I be concerned? Thanks!