Trying to get pregnant

Please help, I miscarried two years ago and yet still have had no luck w a rainbow baby :( My period has always been irregular for the most part. I still have a period every month normally around the same time but not always the exact date. My last period was August 19th. I have a bunch of period apps claiming my period is 3/4 days late. I took two pregnancy test two days ago and got negative on both. :( I’m sure my period is coming but I guess gonna be really late. I was hoping to have different luck being I hit my peak of ovulation September the 7th and had sex that day and the day after. I know it takes time but I’m slowly losing hope. All the advice and tips would help. Thanks so much 🤍

Also I did go to the my lady dr around February and she did blood work and had a pap. Everything looked good. So I don’t understand why no luck making a baby???