Chelle,
Cured, I find it an overly optomistic word. As many others have said on this site, "...you can be cancer free but, you will never be free from cancer."
The biopsy sounds like a good idea and your oncologist is giving you good advice to continue with your dreams. There are many simple things that could be causing this, so have the biopsy and the result will allow you to be certain.
Telling you not to worry about it, I know, is not going to help but, (to quote the lovely people on this site once more), "It's not cancer until your doctors say it's cancer."

My thoughts and prayers are with you.

Cheers,

Mike