What does it mean if your last period was very light and then your next period is 2 days early and you have pregnancy symptoms but negative tests?

It could mean any number of things since every woman's body is different. Age and health history has a lot to with it as well. Another thing to consider is whether you have been sick lately. I would suggest you visit your OB/GYN as soon as you can as false negatives are very possible (and also to make sure you aren't sick with anything).