False positive on Clearblue Digital?

I’m not posting a pic since there aren’t lines, but has anyone gotten false positives on Clearblue digital?

We did IUI the 17th and i was told to test today. I used a cup to dip and the first test said pregnant. I immediately dipped the second tar and that one said “not pregnant”.

I did test early with First Response and had 2 VVVFL’s, but then when I tested 2 more times there was nothing. So I assumed it was a fluke and I wasn’t pregnant. Now the conflicting digitals from the same cup of urine have me more confused.

I have to call the clinic today to let them know the results and I’ll tell them about both tests. But had anyone gotten false positives with Clearblue digital? Are those pretty common on that brand or not likely?