Andie - I too had a freak out moment around the 5 and a half week stage. My GP gave me BT forms to get my levels tested whenever I want so I got my HCG retested and was reassured. I have only had to do it the once as so far so good with they symptoms. Its a very hard stage being between 4 weeks and 6-7 weeks until the symptoms really kick in. Try and have faith that its all ok in there and get another HCG test as its better not to be so anxious. Easy to say right lol. I am surprised they are not making you wait until the 7 week mark for your scan as its better to see the heartbeat, but I know its soooo hard to wait

As for being negative I usually find the good news starts to wear off about 10 days after I get it, then the panic starts in again. First HCG, flying high. Then the doubts till the next one. Then doubts creep in till the scan. Ugh its a vicious cycle