My husband had a vasectomy 4yrs ago. My period was late in November by 2-3 days and again in December. I still had my period but it wasn't nearly has heavy as it always is. I have lupus.so I'm on blood thinners, 10mg of coumadin everyday so I bleed quite heavily. I have taken 2 urine test and a blood test that all came back negative. My abdomen is swollen and kind of hard and my breasts are growing and aching. My primary Dr said it felt like I had a what he called "pooch" in there. Am I pregnant and its not showing on any tests??