What is going on with Melvin! I just got him two or so we...

What is going on with Melvin! I just got him two or so weeks ago, thriving and has been perfectly fine until two days ago when he started to wilt? I wait until the soil is completely dried up to water, moved him further from the window but I’m in rainy season in the west coast so not much sun happening anyway. I’m a very new plant owner and am unsure on how to identify and fix theses issues. Any help appreciated! #BostonFern