My game doesn't load

Recently, I've been trying to play some fc mobile, but I've been hit with a screen where it tells me to choose between my guest account(the one I've been playing on this whole time, with 116 ovr) and a google play account, that I didn't even know existed(with 78 ovr).

But, before it even lets me choose one, it stars to load endlessly... I've kept my game on for 15 minutes and it was still loading... For a split second, it doesn't show the loading, and I tried to press my account as fast as possible, but it doesn't let me... 

I don't know what to do since it is a guest account and I don't want to risk losing it by deleting the game, since I have spent money on it...

I wish to get a reply as soon as possible!