Pregnancy Symptoms

Ashley
So I recently found out I am pregnant and if I calculated right I would be about 5 weeks give or take.  With my 1st pregnancy I had every pregnancy symptom before I even had a positive test.  This pregnancy I would never even know I was pregnant accept for the positive blood work and positive Hpt. Is this normal?  I feel like something is wrong and I almost wish I was sick.  Has anyone else had a similar experience or have any encouraging words?