Advice needed

So i had my period 22 days ago, i had been feeling sick etc and my period was a bit weird stopped after 5 days then started again and lasted toll cd 12, so i took a test and got a super faint positive, next morning negative, so i think chemical. Then a week later i am still feeling sick so test again, and positive took a digital and said 1-2 weeks. So still thinking chemical, just taking a while yo drop HCG. Test again today and positive again.. but not very dark.. considering i would be like 6 weeks if my

Last period was not a period.

Has anyone ever taken ages after a chemical to get a negative?