Am I just overthinking?

Mary
So I don't think I am but my hubby does and I don't think I ovulated last month and I should be right now but don't think I am but I've been getting my periods but I've read that dorm people had it for the first 4 months of their pregnancy and I think I might be getting a belly because it's starting to get hard but I could just be fat I am a lil chubby oh and I've been getting BFN every time I test