I was diagnosed BP1 when my son was almost 2 years old. I am terrified that I may pass on my BP to him. If I had known I was BP before I got pregnant, I would have taken more precautions. I am not saying that I regret having a child, I love him more than anything in the world, he keeps me alive! I could never leave him or my husband, and that is what keeps me from doing anything foolish.
If I had known that I was Bipolar a few years earlier, then I would have made sure that we had taken more precaution. A year before I got pregnant, I had a miscarriage at 4 months. The docs at the Hospital told me that I wasn't going to be able to have any children. My husband and I believed them, after all we had been together for 4 years at that point, I am 6 years older than my husband, and I just figured that I was too old, and we just accepted it.
All of this happened 3+ years BEFORE I was diagnosed.
When we found out 6 months after the miscarriage that I was pregnant, we were thrilled, and nervous, but I had a healthy 8lb boy via C-section. He is perfect, and a perfectly healthy and intelligent kindergartener.
I understand your fear, I live with it everyday.
When I was diagnosed BP, I was totally freaked out in more ways than one......I was petrified for our son. I don't want him to be like me!
I am not saying that how I feel is how the other Mothers here feel, I probably am the only one. And I am not judging any of them, just as sure as they would not judge me for my feelings. I love my family so much, I am blessed to have them, they make my life worth living. I am happy to be a Mother, I think I am a pretty good one, older than most Mothers, but hopefully that means I am wiser! I know for sure that I am the coolest Mom at my son's school

Having children is a very hard decision for people to make, you need to be sure that you can handle it. My husband and I thought that it would be scary, but a good thing. We have a solid relationship. We certainly didn't expect that I would flip out a couple of years later and then be diagnosed BP1!
And now, years later, after all of the Pdocs, therapy, meds, coping skills, etc. I feel capable of living a mostly happy life and I wouldn't trade it for anything.
I feel that my BP is just a "personality enhancement" that can be a burden at times. My husband is a very understanding and cool guy, and he helps me all the time, reassuring me, putting up with my moods, and always removing me from the room if I start mood swinging so our son doesn't see it happening. We have told our son that I have a brain injury......which is not entirely untrue, as I had a serious concussion when I was younger[from my horse refusing a jump, I went down and crashed my head on a rock, good thing I was wearing a riding helmet] that is how we explain to him when I am not feeling well, and he accepts it. He knows about brain injuries from watching hockey. When he gets much, much older we will explain what exactly my brain disorder is.....for now he can just go on thinking it is a brain injury.
I think you are smart for asking yourself these types of questions at such a young age. They are scary questions, and I don't know where you will find the answers, but I hope that I shed a bit of light for you, and I hope some others here will share their experiences with you as well.
* I talk about how my husband helps me [and deals with my craziness!] on some of my vlogs, maybe they can give you a bit of insight into some of the things a BP relationship entails.