When do you stop trying

We have been ttc for 2 years with 4 losses to date. I'm a crazy poas kinda gal. I tested at 12 dpo today and vowed I would never test just cuz I can. I'm finally giving up ever seeing a positive again. It's more disappointing to see that negative every month. Have any of you felt this way and finally gave up trying to have a baby? I'm over it.