The Clearblue Digital Pregnancy Test provides unmistakably clear results in words. [2] Both the Clearblue Digital Pregnancy Test and the Clearblue Rapid Detection Pregnancy Test can be used 5 days before/sooner than your missed period, which is up to 4 days before your expected period. HSA/FSA Eligible This unique Clearblue Pregnancy Test Combo Pack includes 2 different tests - bringing you extra value and peace of mind. See insert.