So weird

I'm reading that a lot of women have symptoms after concieving and dpo. I seem and feel like I'm doing all the right things but it's been three DPO and I have no symptoms. It's like when we try to get pregnant I don't and when we don't try to get pregnant I am but loose the child. I've lost two already. I'm starting to loose hope and maybe start giving up again. Any tips or ideas and or anything. Kind of desperate and starting to suffer from major depression