Loosing Faith

Getting super upset... I thought I was always pretty healthy stopped my BC last July and I was having normal periods. I experienced a chemical pregnancy in January and now my periods have just stopped. My doctor gave me Provera I had a period and my husband and I did the BD all month... Tested 6 times and all BFN and still no period. What now?!! I thought things were going to be so easy and now?!!! Ugh. Any advise or kind words please?