could I be pregnant? any thoughts and opinions will help so much!

Kelsey • TTC rainbow baby! ❤️💛💚💙💜 I have two boys (6&4) I had a MC march 2016 and then a ectopic pregnancy June 2016!
my husband and I are ttc. I got my birth control(nexplanon) removed may 3rd had light bleeding on may 6th-7th. I ended up having my first real period June 2nd-5th. I have an app I follow to help estimate when my fertile week is. My fertile week was being said to be June 12-17th. The 16th is when I noticed the egg white (good sperm) CM so naturally we tried that day. I should be expecting my period June 29th. I took a first response early result pregnancy test Saturday morning....it said negative. 😞 I do not know when I ovulate. I've noticed some slight signs but it also could be in my head since I'm wanting this so badly but I don't know. Today I also noticed some egg white CM. Does anyone have any thoughts? 
To add on I only have 1 tube if that makes any difference. I've never had to actually try and track before and I use to have both tubes. I was told to come in as soon as I get a positive test (the earlier the better) to make sure the baby is implanted in the correct spot due to other recent issues. So I'm just freaked out that I won't find out early enough.