at 4weeks pregnant bled thought chemical pregnancy but still having pregnancy symptoms??

Md
I had bleeding for 3 days like period then spotting got hcg drawn it was low I was told I was miscarrying/chemical pregnancy I've still had lil cramps bloating and been feeling sick like I'm gunna throw up .. Is it possible hcg could have dropped from bleeding but after bleeding hcg rise again n me still be pregnant??