Felt pregnant but then started I think

Ever since I had my daughter 3yrs ago my cycle is usually heavier and 7-9 days. Last month I was a week late now this month I was 8 days late. Bumbed Thought I got what was my period. I only went for 4 days and stopped and It wasn't no where near as heavy as usual. Then barely started spotting earlier. I'm kind of starting to think its not my period but was wanting some other opinions. Thanks ladies