chemical pregnancy or what??

hey ladies so back in June 2014 i believe i experienced a chemical pregnancy. i took a pregnancy test June 13 2014 && theres was 2 lines. First line was very faint but it was there. ive taken a lot of pregnancy test over the year of trying && NEVER did i ever see 2 lines. my bf && i were so happy && excited. i saw brown spotting i figured it would be implantation. long story short we went in that night to the ER they took out blood results for pregnancy came out at 7 doc said thats a negative but that the thing about a 7 it could change that if the case was that i was pregnant that 7 would go up.. he recommended me to go back in a few days. next day june 14 i started bleeding  :( i was so upset.. what do u ladies think could it had been a chemical pregnancy (real early miscarrige) or what.. heres a picture of the test..