How can I keep a good poker face, when my stress levels are off the chart?

I am having an eventful weekend. My friends baby was put into the hospital today. She just called me and said they’re going to keep her baby in the hospital for the next few days for severe bronchitis. I didn’t know you could get bronchitis in the summer! I’ll be going back to the hospital soon, but how do I gather my thoughts and pull myself together. My friend and her husband have been crying and I feel like I shouldn’t cry, to make them calm down when around me. I just want to break down. My friend loves her baby and wants me to help her, but I can’t do anything. I’m grieving my opossum and now my friends baby. My stress levels are at the max. You know that little imaginary line that has at the very bottom “normal” and “deadly” with the little skull looking face next to it at the very top? I’m right at the deadly end. :/ I’ve been supressing everything I can. I snapped once at the hospital and cussed out a nurse because they we’re making us wait and the baby was looking like death. My heart is racing nonstop and I’ve been popping my meperidine pills more than I should for pain. I’ve been smoking on top of that. I have no idea how much more I can take. I just want to scream and cry, but I can’t. Nows not that time to be a “pansy bitch” as my brother would say. I need help.