Should I reconsider what I want to study?

I'm a senior and have been set on studying psychology in university for years now. For the past several months I have been digging deeper into the meaning on psychology and getting into really heavy stuff and I think it's getting to me.. It's been making me see the world in new perspectives, but not all of them are good and I think they're bringing me down. Should I simply redirect what I'm looking into or completely reconsider my choice of study? I find psych entirely fascinating but if it gets to me the way it has been I don't know how it's going to work.. What do I do??