Spotting 8 weeks

I had a bm then wiped and had light pink spotting. I've wiped since and there was no spotting. I'm eight weeks along and don't have my first us until Tuesday. I'm nervous. Is this normal? Should I call tomorrow and see if I can get it moved up? I don't know what to do but that scared me and im super worried about it even though I know that there isn't anything I can do. 😥

I have lower back pain but no cramping.(unless you count gas pain)