He wants to wait to have a child?

I am in a long-term relationship, and we are set to marry in a year, but my fiancé is refusing to consider becoming a parent for a few years. I have my reasons because it’s my body and I know it will be harder for me to delay this decision, but he is basing it on independence and financial security. I don’t think his reasons are completely inadequate, but it still feels as if he isn’t taking me seriously and this is my health on the line. I am getting to a point where I am considering breaking up, and he says I am blackmailing him emotionally by suggesting this. What do I do?
Your health matters above everything else, but so does the need for you to both be on the same page here because parenting is life-altering and cannot be managed without cooperation. You may dismiss his reasons the way he isn’t taking yours seriously, but neither of those issues matter if there is no unconditional compromise. Ending a relationship may seem drastic, but you have to base it upon whether the need to have a child is greater than being with someone you love. If he accepts your condition under duress, the possibility of resentment at a future date can undermine your relationship in other ways. Consider taking a trip together and laying out all your reasons. That might help you both look at this from the other’s perspective.

Why does my girlfriend get jealous over nothing? She is always over-sensitive, and it makes me afraid to tell her anything because I don’t know how she will react.
Her insecurity or what you refer to as over-sensitivity may stem from something that isn’t being addressed. Instead of being afraid, try accepting this as part of her personality and allow her to talk about what bothers her.