My last period was on 3rd April. I am on Metformin and thyroxine. I took blood and urine test on 6 th may. Both came negative. Today I got another hpt negative. But still I hv not got period.in my one previous pregnancy I did nt get a positive hpt until 2 months after last period. Now my breast r tender. Increase my appetite. Right breast became bigger than left. Can I be still pregnant? What should I do now?