I got my bfp yesterday at 9dpo and did a first response test this morning with a much stronger line. But using my tracking app my af isn't due until Sunday, which I've estimated makes me around 3 and a half weeks. Now I'm stressing because I've read all over google that chemical pregnancies happen like 75% of the time. Can anybody tell me when I'll be safer from a chemical. And how likely they are to happen this far along?