22 days late

I was given my first shot of Depot Provera in March, I had about 3 periods in April and the last one ended May 2nd. I was supposed to get my second shot of depot On June 15th but they wouldn't give it to me because I was late, I took a pregnancy test that day and it was negative. But still no period, I go back on the 29th for another test to determine if I can have my 2nd shot or not. We're wanting to conceive but don't want to actually start trying until we're on our own (which is soon)  so it comes back positive then wonderful