Ladies I need help/advice

So a week and a half ago my dr told me we miscarried as the Ultrasound from two weeks ago showed no pregnancy. But still pregnancy tests are positive. My blood work was 22, 85, and down to 68. So 68 was the last test the 1st of March. According to my calculations, if the hcg decreases the same rate as it did, I should have NO hcg in my system.

YET my pregnancy tests are bold positives and the digital test said 2-3 weeks. Which it has been saying for weeks. And i have been lightly bleeding dark red and super dark brown since the ultrasound two weeks ago.

What do I do? We had a loss in January and then told we lost one again but I am not convinced because of the tests. Do I ask my dr for more bloodwork?

If we did have a true miscarriage, I just want to get back to a normal cycle so we can plan to try getting pregnant again.