Confused as can be

Okay so last cycle I was 5 days late. I'm never late, it's like clockwork to the T. Anyways, 5 days late then I had some tissue looking clots then some clothes with red blood & after about 4 days it faded to pink blood but still lasted 4 more days. I usually only have a 28 day cycle, 5 day period every single time since I was about 15, I'm now 22. I'm still having what I assume is pregnancy symptoms & now I'm having O pains, slight cramps almost a week & a couple days sooner than my next expected O day? Could I possibly be pregnant? My family has a history of not being able to show up positive on a test so I don't know what to think & google doesn't have many stories similar to mine. Any advice would be great!