I'm confused!!!!!!!

I have a question. I went to the dr today because I've been getting mixed tests some are positive some are negative. So they did a urine test at the office so when I dropped off the sample I dipped a clear blue and first response test in it as well to prove my point. The first response and clearblue came out positive whereas the Drs test was negative. Needless to say I'm getting my blood checked on Monday. Now I am curious has this ever happened to your. Please share your stories. Did you end up being pregnant