I did a pregnancy test on july 5,2013 came out positive & conceived on june 20,2013, I then went to my doctor for blood testing & the told me I'm negative due to me having a period 07/01/2013 full 7 days & this month 08/03/13 just 5 days. I do have fibromyalgia& neuropic pain & take pain pills lyrica & Oxy, I would like to no if theirs a possibility my my condition of pain & the regiments could be concealing my pregnancy?