Hi, My Wife Is On A Fertility Treatment. We Got

Hi, my wife is on a fertility treatment. we got married in december 2014. she concived in march 2015 and miscarried on may 5th 2015. she conceved again late july in 2015 and misscarried about 5-6 weeks later. she then missed her period in november having seen it last in october 12 2015. we went for a pregnancy test and it came out negative even though she was having all the symptoms of pregnancy. By december 4th, the period returned. but by middle of dcember she started having spotting that later increased to heavy bleeding that lasted to late january 2016. we then went to see a GP. He suspected annovulation and placed her on primolut N to stop the bleeding and also reccomended bromocriptine, clomid and duphaston. The bleeding stopped, her period returned on 5th of february. now is about 30 days on and she has not seen her period. she has a 28 day monthly cycle.we went for a blood pregnancy test and it came out negative. we had intercourse every other day from day 11 to 16 of her monthly cycle. Please do you think she might be pregnant even though the result came out negative?