it can be be you might not be as far along as you think you are give it a little more time
It sounds like you may have ovulated a bit late so thats why you had neg test first then pos. It looks like your hcg levels are doubling as they should be, did they book you for another u/s?
Went for a scan this afternoon and they could see yolk sac and saying Iam under 5 weeks. Oh I forgot to mention I also done a test on the 28th September and that was pos. So I presumed I would be at least six weeks. My last scan I looked at and it had nothing there. Sonographer said it was a ball of fluid. Today I didn't get to look. So I am still presuming something is wrong. I've been pregnant 3 times and I've always had a pos two days before a pregnancy. Ive had cramping and pinkish discharge, pain in my side and constant bowel movements which i've never seen. I was looking at my Hcg levels on the net and it said anything between 1,080 and 56, 600 is a 6 week pregnancy so Iam so confused If I was four weeks it would between 4- 425. so I am confused.