PLEASE HELP!

Emily
My husband and I have been ttc for about a year now and it wasnt until January I finally decided to give this app a try. I have a 30 day cycle down to the dot. Its never changed.I also had an ectopic pregnancy in September and it was devastating for us both. We have been ttc our first since January ever since.Glow notified me i was ovulating April 7th and that was the day we BD.A couple of days later or so I was having some brownish spotting, which caught me off guard due to the fact that AF wasnt suppose to arrive yet.I am currently 11 days late. Theses were my symptoms for a couple of days: tired,hungry,nauseated but not enough to throw up, and dizzy.These symptom have currently subsided a little.I took 4 pregnancy test 5/28 and got all BFN. Im wondering if its possible for me to still be pregnant and me not get a BFP.So help! What should I do? We both really are hoping we finally conceive this time.