Two weeks ago I weighed a decent 125lbs and I am around five feet eight inches, two days ago I weight myself and was 120 and now I am 118. I haven't been this weight since I started highschool seven years ago.

I had been stressed out, going to summer school and working, though I have still been eating healthy as can be. I walked to and from work mostly everyday as well as to the bus stop which is a 20 minute walk each way though this is a regular exercise routine. Could there be something wrong that I should see a doctor about?

Thanks