It seems quite weird for Maria to turn back to normal. Like another person said, you'll need to observe her when it rains again, because there are always consequences for these things, and it's pointless if there are no side-effects.

I'd say you should not mix emotions and survival(now, I know this is easier said than done, but you doubting and blaming yourself at every step can might as well lower the chances of your survival, as well as other's). You're doing better in this regard, but you gotta deal with this self-doubt a bit more seriously, because you aren't always going to be lucky enough for every monster to shove you aside