Is this Normal?

Alexis
Last period was Nov 1st (end date) since then I have had no spotting or anything. Took two pregnancy tests about 2 weeks ago and the came back negative. Then 2 weeks ago I saw a little pink after using the bathroom thank goodness right? Wrong! Nothing happened after that and not my body feels weird..not sure if due to getting sick (flu is going around) or what. Has this happened to anyone else? 
I have a Dr's appointment Saturday but I'm curious if anyone has had this happen before.