Sometimes the class is easier than the exam, it all depends on the teacher. For me, at the beginning of the year I ask my teacher their AP score distribution for the previous year so I can gauge the difference in difficulty, I recommend you do that next year.
As for right now, there’s nothing you can really do. When it comes time to make your college application, just leave psych out.
And for Bio, congrats! A three might seem mediocre right now but a lot of schools give credit for them and if you’re planning to apply to one of them in the future, definitely report it!