This TTC Thing can be confusing. Plz comment

Lauren • Expecting baby #1 💙💗 February 2016
My story....
   Last month hubby and I had what we believe was a chemical. I has very faint likes for 3 days on my hpt but they never got darker. I was 1 week late, but once negative hpt..I started AF 2 days later.
   Currently this month I am 3 days late. I 1 test and it was negative, took another it was positive. Then 2 more and negative. Today I started with the brown discharge stuff when I wipe. Still negative tests. Here's a pic of my BFP but confused on all of this. Help me!