Hi doctor, i am 39 years old female. Got tubal ligation (band) done in 2006 immediately after an abortion procedure. My lmp was on 19th of may 2016 and i started with physical relation with my husband almost every day till ending of may. Then on 2nd of june i got light spotting which was only for one day. Then on 23rd june i started with a bit heavy bleeding that lasted for around 4 to 5 days (usually i get my periods only for 2 to 3 days). Now its july 24th and i hav nt got my periods as yet and having backache, feeling more hungry, feel sleepy and tired, stomach is bloated and has grown a bit, jst cannot wear my jeans as i feel discomfort and slight pain in my lower abdomen. Did a home pregnancy test today but it showed negative. What can it be?