Its been 64 days since last period, 2 weeks ago i had a blood and urine test for pregnancy as i was experiencing all the symptoms. The tests came back negative, im still getting all the symptoms ( Tired all the time, going to the toilet often, lower back pain, nausea, and adombinal cramping - mostly on my ridht side) today i started feeling around my stomach and on the lower right side i have a a rod like lump which was never there before im worried about wha it could be?