Should i be worried??

My period has been off set since October no recently my iron dropped really low in mid April n I have been nausea for a week n I haven't been in the mood for sex lately n my bf n I are trying to have a baby past year n half n the test results came out negative n I had couple miscarriage I don't want to do?? And how can I get pregnant n actual have my baby n how come my iron dropped really low in April??