Could I be pregnant ? Help!

I've been having weird periods. Lighter than normal. Full breasts, super tired all the time. I know you can get your period when pregnant but it's happened. I can't seem to freaking lose my belly weight/bloat! It's been getting worse and I've been gaining weight. Super vivid dreams and now I'm feeling a fluttery feeling on the right side of my stomach. Am I losing my mind? We've been trying for a while but I don't know anymore.