Please Help!!!

I am 22 weeks today and last night before bed I went too use the bathroom & after peeing I wiped it was a very light colored blood on the tissue it was kinda late so I went too bed later I went too use it again and when I wiped there was no more bleeding so I went back too bed & this morning I went too use it again & still nothing I feel okay & I'm in not pain besides growing pains & I have 2 more weeks till my next appointment should I call my doctor or wait too see if it happens again ima ftm so I'm really scared.... Please Help!!