My last period was around 24-26 dec,2018 so I was expecting my period to be around 26 Jan but it didn't happen.. only very very light bleeding (not like period blood) was there for alternate days (around 2 days).. so then i decided to take urine pregnancy test on  3-4 feb and it was negative.. so I thought I missed my period because of complete change in my daily routine.. To be on safe side, I again took a urinepregnancy test around 18th of feb but it was also negative.. now it's been 28th February my period is still not there... What should I do? I am afraid if I am pregnant.