Faint bfp?

I had a chemical last month (confirmed by dr). Started bleeding on 9/22 it stopped 3 days later. Dr said we could start trying right away. Had a positive opk on CB digital on 10/10.

The past week I've been having symptoms so even though I said I wouldn't I decided to test today at 9/10 dpo. I got what I think is a bfp but it's faint. After the chemical I'm scared. Would love some opinions please! Af due tomorrow.