Translation of "mistroisk" into English

Men undersøgelser tyder faktisk på at det samme kan ske hvis man er mistroisk.

But did you know that some research suggests that being distrustful can do the same?

Jeg fortsatte med at ødelægge mit liv ved at være mistroisk over for alt hvad Mark foretog sig.

I continued to make my life miserable by being suspicious of everything that Mark did.