Well, Im going to answer the OP and this little discussion. The discussion is coming first.
I know this is personal experience, but I have rambled a lot on MBTI statistics and I have not found any of them supporting type heritage. The same for enviromental heritage, although in this case there is some controversy, since people who claim that type is unchangable tends to support that the enviroment dont change what people truly are, but rather creates some adaptive behaviours that disappears when the enviroment demand disappears or remain as a trauma, not as a part of a person. I prefer this line of thinking while typing. And there are people who claim that type is changable , they tend to support that the enviroment truly change people recreating their personality. Also, I already had read long time ago some people (Im a little bit lazy to search for it again) saying that the fathers and mothers type has nothing to do with the childs type and a tons of comments saying "yes, my family is like that too". I am one of these guys with that personal experience too.
Getting back on topic, Gabby, there is a little mistake in MBTI community that the type descriptions mostly lead you to think that perceivers cant plan (like they are forbidden to) or that perceivers cant get organized. Thats not entirely true, the plan part is not true at all. You are NOT forbidden to plan because you are a "P" type. I even already watched shows or movies with P types being full of plans.
I think you dont like uncertainty because it naturally generates a little bit of anxiety and you dont like the anxiety because you have anxiety issues. Since you dont like uncertainty you will want to be prepared for things, because being prepared reduces anxiety. So, you not liking uncertainty and being prepared is more linked to an issue than to personality trait. Despite these traits, the only things that supports NFJs thing is being organized.
I dont see you liking having and pursuing "one big vision" (or a family of big visions), although you might think you do because you take uncertainty out, but that only happens because of the anxiety issues. You seem more on the indecisive side, with having rather some plans and freedom to change (so you wont get anxious and feel safe) instead of one single plan. So, I think you are INFP, weirdly organized, that dislikes uncertainty and have always a plan because of anxiety issues.