10 days late, 7 pregnancy tests negative. What's happening?

I had my period june 1 to june 5, 2017. I had sex by june 13 at 11pm. My calendar said my ovulation day is June 15, so the morning after I took ECPs.

By June 26, I got bleeding it was heavy for 2 days and very light the following days. That everything I wore got stained. (my period was due 29th. I was 3 days early. And i worried it might be implantation bleeding but IB is uncommon and it isn't heavy enough to fill lots of pads)

My next period is due July 24th. Instead, I got a white discharge. I don't experience classic pregnancy symptoms as well apart from my missed period, and tender breasts.

Since I was depressed the first week of the month as my bestfriend and I fought. By 2nd week of the month (which i suspect is ovulation week) i was craving foods (the cravings went away) and i only had like 32 hours sleep total in 96 hours (4 days) because of work (i work as a medical laboratory scientist at a hospital and got night shifts that time) Then the following week, i went into a rigorous dance practice for work as well. I haven't excercised or danced in a long time. As my due date was approaching, i was worried that i might have a period during performance as my performance is on the 26th and period was due on 24th. Performance day came, and i was glad my period didn't arrive. But eventuallY got worried it's not here yet. 

It's august 3 and not yet here

I took 7 pregnancy tests and all were negative. I took 3 a week after my period this july as I worried it might be IB. On my 2nd and 3rd day of missed period, i took one. One the 4th day, early morning. On the 8th day of my missed one, i took another as well. All were negative. Could I be pregnant?