Sadness and the grievance time

I miscarried a little over a month and the pain is still there it comes randomly, I have my good and bad days. I’m at work now tearing and constantly wiping away my evidence of pain before anyone notices (here’s the crazy part I work with kids). When the pain hits on those bad days I think of my grieving timeline, I know it can go on for long it’s pain. I’m sitting here there’s a woman holding her baby (can’t even walk maybe 2-3 months) and other women are holding her, talking to her their all so happy and I don’t know how to feel. How long was your grieving process? Please tell me sooner or later you got pregnant I could really use some good news. I’m attaching a quote I found that expresses my feelings.