very depressed

so im praying that this is my montj for baby#2 after trying for about 16 months. i am suppose to get af on the 19th of this month but have been testing and still not even a vvfl...im getting more nervous and depressed because i just want to be pregnany and im so tired of seeing negative test. my mind keeps going to if im not pregnant i should just kill myself...i know that is wrong and im not going to do that because i have my amazing son already that i have to make sure hes good and my husband who although im not very happy with right now i want to be with. i just am so tired and i feel like im failing at life and the one the my body should be able to do, it is strugging. please pray for me guys and my mental health.