What am i doing wrong!!! Ugh

Me and my SO have been TTC for about a month and a half and i keep getting BFN.. And then AF comes.. Ugh.. I just started trying opk.. And not fertile yet.. Im so anxious and want a baby so bad, that i get upset when i hear friends announcing they are expecting.. Im like what am i doing wrong.. I have been taking prenatal vitamins for awhile now.. Anyone have any ideas or suggestions.. TMI...Me and my SO have bd everyday or every chance we get... Please help... Baby dust to all.. I just want my BFP...