is this a false positive?

M
Hi all, I have recently had a mmc which was managed medically by the hospital. I started spotting 24 days ago (would have been 13weeks but baby stoped developing at 6.5weeks). Was administered my mysoprostol vaginally 17 days ago and passed everything that evening. I have had spotting on and off since then, but hospital confirmed I had passed everything that day!! Now we have had lots of unprotected sex since. This morning I got this vvf positive (looks clearer in person to be honest).. what do you think? Is it still HCG in my system or should that have passed if docs hold me I had passed all the pregnancy tissue?
I will retest in 2 days.
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