J.D.
R.,
First, wait until you hear on Saturday before you make any hard and fast decisions on anything. Then find out what your options are, and weigh that into your decision.
You have three children. A boy just entering his teen years, a girl who is going to be starting middle school, and all of the drama that comes with that, and a not yet year old baby girl. Three children who need you. Are you confident that you can go through a pregnancy with cancer, and then try to care for a newborn and receive whatever treatment is nencessary, and still meet the needs of the three children who rely on you? Depending upon the type of cancer, and rthe course of treatment, illness and exhaustion are often part of the program. Are you up to taking on another newborn and your three children's needs in that condition?
I'm sorry if this sounds negative, I hate to tell anyone "not a good idea", but I would be worried, both about your health if you postpone necessary treatment for another pregnancy, and also about how well you're going to be able to function through treatment and recovery while caring for four children, all of whom are in or entering really intense stages of life.
If you think you can do it, and your husband is on board to really pitch in, and your doctors say it's opkay, then go for it, but please take the time to really think about what you're signing up for first.
Best of luck to you and your family.