Finally got my tests in the mail...

TF

So a lot were saying after my MC that my HCG levels could still be up and making me have positive OPK readings. I miscarried last Thursday the 11th and my HCG was only 12. No d&c.;

I stopped bleeding the 13th so I started my opk testing using clearblue advanced digital. The 13th & 14th were both low. 15th, 16th And today I got high readings. My pregnancy test is negative so should I assume these opk readings are real? I feel like they would be accurate.