Bfp after chemical preg. last month🤞

Last month (August 1) I received a FAINT bfp, as time progressed, line never got darker( refer to photo of single test) On (August 5) I began spotting in the morning, with period like bleeding hours later😪 ER and doctors confirmed negative at this point. — yesterday I took 4 test, back with BFP’s with darker lines than last month! (Refer to multiple test photo) the last test (undated) was taken this afternoon today.

Two questions—- does the test line on today’s test look slightly darker than the control line compared to yesterday’s test???

Also, anyone who has experienced BFPs next month after chemical, any success stories??