Is it possible to get a false positive for ovulation test?

TrustingHim • TTC 4 years with my hubs for baby #1 💗 Finally expecting our little princess October 2019! God is good all the time!
I took ovulation test twice yesterday (last night and morning) and it was O so low fertility. I took it again this morning and it showed a smiley face which is high fertile. The test doesn't have flashing smiley face, just O or solid smiley face. I'm confused because I checked my CM and it's just watery, but not stretchy. And my boobs aren't sore at all... If you could please drop a comment an let me know your opinion!  😁

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