Lowering then rising hcgs after miscarriage???

[yuG97]

I had a miscarriage about 2/3 weeks ago. I had and ultrasound where they seen a sack. I then started bleeding and lost the sack. I then went for a bloodtest and my hcgs ha dropped from 3300 to around 500. I had a ultrasound after that and it shown everything was back to normal everything had vanished and i was ovulating. My hcgs were around 200-300 at thid point. I got told to take a test 2 weeks after my scan so i did. I got a positive result so i went back for a blood test and my hcg levels came back to about 500 again. 2days later they are now 200-300 again. I have to go back for more bloodtests but im really confused as to whats going on??? Why do they keep rising thendropping then rising again after they told me everything had come away???

[Sophia1984]

Could you have got pregnant again?