Last night I got home from my Christmas work do and took a test as my period is late. I'm on day 42 of my cycle which isn't unusual for me but my cycles have been pretty regular for the past year. I did the test and positive appeared instantly. Not super dark but a definite line. Anyway, this morning I retested and there is no line. There might be one if I squint but not clear like last night. I'm so confused. I'll test again later but.. what. TMI but I had sex last on 16th November and 1st December ...pic or positive below.