As soon as bleeding stopped that next day we started having sex

I stop bleeding next day after miscarriage my hcg level was down to 20 I go Monday for another HCG level check. I had miscarriage Oct 25 so its been 9 days since and been having sex since then

So sorry for your loss. I had a miscarriage and know everyone one is different. But the nausea could be your hormones trying to shift back to normal. It would be to soon to feel any pregnancy symptoms if you were to be pregnant again. I’m assuming you stopped bleeding which you are very fortunate on that part.