My problem is related to preganancy I got some bleeding on 16 feb 2018 and lasts for about 1.5 days. It was not like mensis the color was different and there were no tissues like we get when we have mensis.. After 31 january i got some headache and dizziness, breast size increases and thirstyness also double. But I have done preganacy test 4 times and I got negative result always and in march month i didnt have mensis but there was a menstural cramps everyday. So i am confused can i be pregnan