I'm lost

I'm a Junior in college and I've now take two philosophy/ethic courses and they've confused me. I understand the subject matter, it's my beliefs that are confused. I feel like there's something wrong with my beliefs now because for every reason I give on believing something there is easily a counter argument. I have this feeling that I need to justify my beliefs now with things other than "because it's right, or good". Is this bad?

Maybe I'm just persuaded easily, I'm unsure. Are there any ethical views that are widely accepted that are not based on religion? I could go on and on with questions I have now, ugh.

Sorry if this rambling, just a little confused now.