I don't know how far I am...

Nancy
This is kinda long. Sorry. 
According to this app I am 13w6d today. With the way my insurance works (HMO) I have to wait for a referral to an OBGYN from my PCP which I received today but HATE the doctor I got so I called to get a new one and there was this big mess that will most likely not be resolved till next week since its late Friday. 
This is driving me crazy because I at this point I don't know anything for certain. 
I took a home pregnancy test that came out positive and my doctor also gave me a urine test that came out positive but that's as far as  the information I know goes. I'm dying. My last pregnancy was traumatizing to say the least so I am really anxious just to know baby is healthy so far. 
So can anyone help me sorta figure out how far along I am? My period before last was March 17 to 20. 73 days past and I get my period on May 28/29 to June 3rd. I spot for a week during the first week of August and get a positive pregnancy test on Aug 21/22. From this information am I really almost 14 weeks?? 
I have no idea when I will get to see a OBGYN.  :(