Late period maybe pregnant

We have been trying to get pregnant. I had a miscarriage on September 11 & then a dnc on the 18. So we took time to let my body heal & us get through it together. We started trying again right after Christmas. I had my period on January 21. I should have started on Valentine's day as of now nothing. I have taken 4 pregnancy tests one 9 dpo, 12 dpo,then 1 on Valentine's day then the day after negative. I have all the early pregnancy symptoms but the tests are all negative. I'mr wondering if it's to early I would be a little over 3 weeks. I was so upset we are really wanting our rainbow baby.