Missing period

Megan

Last period was Sept 4th and when my period was due on Oct 2nd I only had a tiny bit of spotting then nothing for Oct 3rd and 4th and had tiny bit of spotting again on Oct 5th and the 6th was my last period day and I had nothing. Did a pregnancy test Oct 8th was negative and had a Bata Hcg blood test done on Oct 10th which was negative aswell. I am now 21 days late and its been 49 days since my last period . I have some yellow diacharge which is odorless and no pain . The walls of my vagina seem to be swollen. And My next period is due Oct 29th ... saw my doctor Oct 18th all she told me to do was keep taking a pregnancy test every week . Anyone having a similar situation or and ideas or advice