Aviza,
I truly understand your desire to have children. It's physical, emotional, spiritual, and it's very deep within us.
That said, it is concerning to me that your doctors consider a pregnancy to be high risk for you. Why is that? Medications that you need to take for your health? Are there changes that you can healthfully make to make a pregnancy "safe" for you and the baby?
It is hard ~ but, sometimes it's best to not push our bodies any further. For example, I pushed myself to have my 2nd daughter. I honestly love everything about her. BUT I lost control of my epilepsy early in my pregnancy. The seizures got worse quickly, and required a doubling of medication (which held possible side effects to my daughter). Thankfully, she was born healthy! However, I never regained control over my seizures. I had to go to experts, which led to brain surgery & that had major lifelong side effects (both physical & emotional). That is my reality, 13 years later.
I truly love my daughters down to my very core.

But, sometimes we have to seriously consider what doctors are advising and ask for complete reasoning for their concern. Then you can make an informed, educated decision on what's best for you and your family.
Best wishes to you!