did i used to be a sperm?

You used to be billion-year-old carbon. Same as the stuff the stars are made of.

The genetic material that was in the sperm and the egg are the pattern from which you grew. In that respect, yes, you used to be a sperm. But there's more to it than just that.

No, no one was ever a sperm. Sperm cells must fertilize the female egg to create a fertilized egg, which will then divide and turn into an embryo. So you once were an egg but never a sperm. Just chromosomes from the sperm are inserted into the egg.

Not really, because your subconscious brain and your soul did not exist when the sperm that created you was just swimming around in your fathers nuts. You didn't become you until well after the sperm got to the egg.

You are the combination of a sperm and egg cell. Correct.

no, but you were an egg, which brought forth your spirit inside of your body, and you'll have that forever.....

yes we all did at one time

something like

No