I wouldn't jump to the conclusion that you're lazy. Part of the reason, as you already stated, is that you don't perform particularly well in religion and psychology... so who WOULDN'T want to blow off the work involved with those classes? Also, you could be "burned out" - this is something you commonly see with people who are on the "home stretch" with classes.

In my case, I just remind myself of why I've been doing all this hard work. I can't get the job I want if I don't do well in school and get my degree. Also, instead of thinking, "UGH, I have to do _ more months of this," I take a more optimistic approach, and think, "YES, I ONLY have _ more months of this!"

I think it's important to talk to people about how you're feeling. Yes, there's a chance someone could think you're lazy... but when we don't process our feelings, we tend to bottle them up and explode (which could result in your failure to meet deadlines or perform well). Find a couple of people you feel comfortable confiding in. I'm fortunate enough to be in a clinical psychology program, so my professors and colleagues are therapists. =P I'm betting there are a few compassionate professors in your program, though, and your colleagues can certainly relate to the stress of having to find placement sites, having to study for exams, etc.