Yes this is normal enough. The size when flaccid varies a lot and has not connection to the size when erect. Your real penis size is when your penis is erect. Read about "Penis Size" in Related Questions below.

Yes, in some cases the penis is too big or thick, or the vagina is too tight (or both). This, making the penis not be able to fit

Good.

Dude, they have to take blood out of your penis with a needle.. Go to your doctor, you can become blind with not enough blood to your eyes, i am serious.

If your penis is curved either to your left or to your right , it is no concern as you can still have intercourse.