Short LP, any one else have one?

So today I was researching having a 9 day LP and I learned that it's too short and can make it difficult to get pregnant. My husband and I have been TTC for 3 month, so I'm glad  I found this out now rather than later on. I also read that taking B-Complex helps lengthen your LP and some women even said that their first cycle while taking it they noticed a change and some even got pregnant. AF is here, but I started taking B-Complex today, so fingers crossed it starts working this month. Has anyone else had a short LP and had trouble conceiving or did you conceive without an issue? Any tips/advice/comments are really appreciated! 😃