Concerning having a 4th child, what should I do?

Its never rude or selfish to want children. They are a blessing. I would say that having a 4th is not impossible but you may have to alter the way you get the 4th. I had tough time conceiving too and my husband always told me he would take me over the baby any time because he knew me and loved me. He doesn't want to risk losing you and you don't want to risk not being their to raise your children you have. So maybe for number for you should consider having a surrogate carry for you. I know that will take a special part away but it is an option. And there is also adoption as another option. I wanted to to have 6 and, I didn't get that many. I had to adopt some too but I know the Lord is in charge. Good luck to you