Symptoms

Ok so I'm 5 weeks 4 days. I had been tired and my breast were tender. The past two days I feel nothing. I feel normal. I'm so worried. I work for a ob/gyn and I know symptoms are not always a true indication that thing are wrong or right. Just freaking out a bit. I can't share with my friends cause they would say I'm just being dramatic. Will have a sono Friday at 6 weeks. Anyone else feeling the same?  Or am I worried too much? This is my first pregnancy.