hi, i am 24 years old married woman,with 5.2 feet height,usually under weight, but past 15 days,i have out grown my clothes. i have remarkable blue veins on my breast and they are swollen,have heaviness in lower abdomen and a lower back pain. i had a strong vomitting sensation last night but din't throw up.i am unable to eat anything. took a pregnancy test today at home and it was negative,could i be pregnant?