Confusion

I’m very confused and could use a little advise or feedback as to what you guys think may have happened. At 8dpo i took a pregnancy test, i didn’t see a faint line. I posted a picture on here and asked what you guys thought. Most said they saw the faint line. Comes around 10dpo i took two test. A first response and a clearblue. On those i did see the faint lines and others on here did too. However, i took three test this morning and they were all negative. What could this mean? Two months ago i had a miscarriage and had to get an emergency d&c. Could the test i did take and saw those faint lines be indent lines or what do you guys think happened? Let me know. Please and thank you!