Pregnancy Info HOME

I have had 2 pregnancy tests both negative one ept at home and 2nd dipped test uring at clinic. for the last 5 or 6 months my periods have changed and been normal bleeing for 1 1/2days and then spotting for the remainder. I didn't think much about gaining weight over the winter and then 1 month ago I felt a fluttering about 2 inches below my belly button. That is the day I took my first test. It was negative so I didn't let it bother me. Since the the flutters confinuted not everyday and they got higher, they're now right at or above my belly button and more spread out over my stomach. I was about 10 pound over weight and carry it all in the abdomen,. In the last 2 weeks I've gotten a lot bigger and look like I am 6 months pregnant. I went to a clinic today and the urine test was negative. My belly is firm underneath of 1 1/2inch of fat there are no fat rolls it's just all out there Has anyone else ever had this happen? Would you get a blood test ????