Last month you got your periods after 49 days This month you are on the thirty seventh day and no sign of a period Pregnancy test is negative What could be the reason?

The best thing would be to make an appoint with a GYN. Just maybe your not taking the pregnancy test at the correct time of day to get a accurate read, the best time to take a pregnancy test is with the first morning urine it believe to be the strongest to read the HGC levels in the urine to get a positive pregnancy sign. Also you may need to take a blood test because the home pregnancy not working for you.

Even is some case blood test have came back negative for a pregnancy if your hormones does not read a certain level it called a non pregnancy "IT have happen to me" my blood test came back as a non pregnancy and a month later I went back I was 8 weeks pregnant. So the pregnancy thing can be a bit tricky so just hang in there and go see a GYN asap.