In the middle of mourning the loss of hard earned money on a watch I didn't realize was fake, I noticed something was very wrong with my Lange 1815 Chrono. The first thing I noticed was that it was running at lightning speed, as in, it gained almost 5 minutes in an hour, which is ridiculously off. So I flipped the watch over to have a look at what was going on, and I noticed that the balance wheel was beating very weakly for some reason, like there wasn't enough inertia in the springs or something. This was extremely worrying as it was fine the day before, and all of a sudden it was malfunctioning to this extent, it was keeping time of +8 a day which is decent, in comparison to a sudden change to 5 minutes an hour.
I couldn't think of anything that I did wrong; I never dropped it, I never banged it, so it didn't make sense. However, there is one thing that I think may be the causation of this, I went to visit an embassy today, and I had to put all my stuff, including my watch into the X-Ray machine, along with my iPad. Now, my iPad screen protector has a small magnet near the edge to hold it in place, and it is possible that the watch may have come in contact with it.
My question, is it possible that my watch has been magnetized by this? Seeing the significant decrease in accuracy in such a short period of time? Or is there really just something wrong with the watch and needs to be sent into the service center to be investigated?
Please advise, I've been having a lousy week

Not the best,
Enrique