?chemical

I got a bfp on Thursday at 15dpo and have been feeling pregnant for over a week. Friday I started bleeding but it never became a full period but heavier than spotting. Bleed only lasted 36 hours and now just having mild brown discharge. Still feeling very pregnant today and vomited last night. Test positive today - not any darker than last test though. Is this a chemical that is still showing up? Something else? Tests attached are from Wednesday and Thursday. Today’s test is the same as the darker one.