I’m having a chemical and can’t accept it

I’m 3 weeks and 4 days or would have been. Got faint, but very obvious positives the night of April 5th at 8dpo, April 6th and 7th. The 6th was the darkest. During the day and first thing in the morning, I would get fainter results. Now I seem to be getting negatives. I’m testing one more day tomorrow, but I think I need to give up. I’m still having symptoms and I really don’t want to admit this pregnancy is done. Has anyone every heard of tests going negative and testing positive a few days later again early in pregnancy? Period is due Wednesday. Looking for any bit of hope 🥺