Why does it take so long when we're doing everything right??๐Ÿ˜”

Every month getting my period is the most awful feeling. I feel miserable and like an absolute failure! We're 33 TTC#1 since August last year. Both healthy and fertile yet it hasn't happened yet!! We're doing everything right, taking vitamins for me and for him to aid his already super sperm, yet every month when I see AF, my heart just sinks. There are couples that drink way to much and smoke and yet it happens for them whereas we who are healthy and fit and ready to have a baby, and pray so much to God to give us one, it's not happening. What am I doing wrong?? For the past 2 months my spot on 27 day cycle was delayed for the first time ever by 2 days and gave us false hope only to feel even worse. I have all the pregnancy symptoms a week after my fertile period. I feel nauseous, heightened sense of smells, my breasts and nipples are sore and my tummy even feels different! Am I completely losing my mind and slowly becoming insane? I constantly Google "tips on falling pregnant", "early signs of pregnancy", etc etc etc. yesterday was CD28 and I had brown spotting, I spent the whole night hopeful and googling whether this was implantation bleeding, but I woke to that awful glob of AF. Everyone is pregnant from our group of friends or trying and it will prob happen for them sooner than me. The 4 days during my period are worse, I go into a state of depression and anger and crying. My poor husband has to deal with mental me because I take it out on him, but I can't believe the one thing I want so badly is taking so long ๐Ÿ˜”๐Ÿ˜”๐Ÿ˜”. I just want my own little baby so much....