You got told you lost a baby last week and you were 5 wks pregnant is it possible to still go through the pregnancy symptoms?

Assuming that your Dr. was correct you may be experiencing the psychosomatic symptoms of pregnancy, commonly referred to as "Hysterical Pregnancy". Please see your Dr and make sure that you are O.K.
When you have a miscarriage it can take up to 2 months until the pregnancy symptoms goes away due to the hormones have not settled yet. It's normal.