I'm sorry to say hun but if you research clearblue digital a lot of women have gotten false positives. On the other hand that may not be the case, the clear blue digital may have given you a real positive but your urine wasn't concentrated ntrated enough with the frer test. Ovulation tests can give you a positive if you're already pregnant. I would wait a couple of days and test again.
I thought my first positive with the clearblue was false because after my positive I got 4 negatives, 2 of the negatives were hospital urine and blood tests. But it turns out I actually was pregnant and clearblue was the only test that told me very early.
Goodluck hun, this could mean you are already pregnan! Lots of prayer and baby dust!