Hcg levels stil rising after miscarriage


Hi all,

I have had a blood test on 19 June and 21 June and the hcg levels stayed exactly the same at 13700. They then told me that i am miscarrying but had to wait to Monday to get an ultrasound. So I had the ultrasound on Monday and they only saw the gestational sac which was empty and measured 15mm. I was 8 weeks my then and it should have measured 29mm. So they told me again I have to wait for another ultrasound and blood tests. So today 27 June i had another blood test which is higher but only at 18000. I only have my ultrasound tomorrow and just wanted to know if anybody else has experienced rising hcg levels when miscarrying. I thought it was supposed to go down.