Am i pregnant?

I took up my pregnancy test 3x and its positive. Then i had my transv ultrasound kaso dahil estimated 5weeks plang wala pa daw silang makita and hindi pa nila masabing buntis ako. Possible bang hindi ako buntis ? Kasi i experience spotting/bleeding, tenderness din ng breast. Nakita din nung obsono yung spotting/bleeding ko niresetahan ako ng gamot pampakapit and the babalik ako after 2-3weeks para magpa ultrasound ulet.