With all due respect, your posts all seem to read like a diary of unsafe flights. From questionable airworthiness of the drone due to damage/DIY repairs, to possibly illegal flying locations and possible health issues, it might be time to take a step back and focus on making sure you have a 100% airworthy drone and a much tighter grasp on the rules in general. If you regularly have to ask if you were allowed to do something, that is a red flag. I realize flying a drone is cool and exciting and that makes everyone want to just get out and fly ASAP with minimal preparation, but that is the wrong approach for a hobby like this, as tempting as that may be.
Flying at low altitudes in a large school field or something (in a legal area with nobody around) is a good place to build your confidence, work on your flight skills, and familiarize yourself with features of the drone. Just be honest with yourself and stay safe whatever you decide.
In this case, as long as you were within legal distance of all airports/airfields/helipads and flight paths for takeoff/landing, that plane was probably thousands of feet above you. As long as you obey maximum height rules, and stay far away from airports and flight paths, you should never be in danger of having a collision with an aircraft under any normal circumstances. If you ever find yourself in a situation out of the ordinary where an aircraft may look much lower than usual, or if you have any doubts whatsoever about the situation, land your drone immediately and wait for it to pass. Better safe than sorry in every instance.