please help!!!!!

I had mirena since Feb 2008, I got it removed may 30th 2012  because the hubby and i are ttc, 3 days later i was bleeding, I clotted for 3 days and had a normal period for the other 3.  (i also came on my cycle lightly in may for 2 days), now i never had any complications with the mirena as long as I had it, and my gyn had no problem taking it out.  it is now July and so far I am almost a week late for my cycle. I had the cramping for about three days off and on (sometimes it was really intense), and since the 9th of june my hubby and I have been having unprotected sex very frequently. i took a pregnancy test on june 30th but of course it came back neg.... im just wondering what could be the deal? should i buy another test now? or wait it out??