Not sure what I should weigh

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Needing advice. I am currently 5'6 and weigh 165, right before my wedding I got down to 150. I felt great and thought I looked great. However, I keep seeing people on this site that are my height, but weigh got to their goal weight of 126-132. That seems really crazy thin to me. As when I was at 150, I was fitting into a size 5/6. I am not trying to be a size 2!

However, I am starting to feel that maybe I am a lot heavier then I think I am. To be at a normal BMI I need to get to 154.

Now I am not sure what my goal should be anymore!!!!

Any advice?