How can I d get pregnant

Hey ladies this is embarrassing put I had a miscarriage 3 year ago and my period go irregular but before I got pregnant it become regular and 2moth ago I found out I was pregnant but but then had a miscarriage I got my period last month but I have not gotten my period this month am almost 2 week late but i got a negative test today and I sometimes get back pain and me and my husband really want to have a baby any advice ladies has this ever happened to anyone