Stressed beyond

Ok, so I'm 21 weeks with di-di twins, b/g, my cervix is funneled completely through so I had a stitch put in last week, moderate bed rest. Yesterday I started loosing my mucus plug, I need to call the Dr but I don't want to be put on hospitalized bed rest till the end of my pregnancy (which is what will happen, I've already been told) 2 weeks ago I found out my youngest daughter has an inoperable brain tumor in the middle of her brain stem ...they gave her 6 months to 2 yrs, she's only 5...I want to spend as much time with her as I possibly can. I feel selfish and like I'm putting babies on the back burner...I just don't know what to do anymore...