So depressing

Kylee • 24 years young. Married to the love of my life! TTC #2
I want to give up so bad. AF is due in four days. Still a BFN.  I have been trying since September. I'm only 24. I have one healthy 2 year old boy. I take my temperature I use opks I take vitamins like what is the problem. I just got some preseed and will use it next cycle. I cry every month when my period comes.