Period ended yesterday. took 2 microgestin pills before today. throwing up. positive ept test, negative clear blue test. can false positives happen?

Congratulations: You're most likely pregnant. A false negative is much more likely than a false positive. Either see your doctor for a confirmatory test or wait a few days and retake the pregnancy test. False positives can happen under certain circumstances but are very rare.

Pregnant: Actually clear blue easy pregnancy tests are not as sensitive as EPT. If you repeat the clear blue easy next week it will likely be positive also.