It's very important for you to be who you are. God has designed you the way that you are, and He placed you exactly where and how He wanted you to be in the body of Christ. He has done this joyfully and with great care! So you get to be who He created you to be, and you don't need to be who someone else is or who others expect you to be, and other people don't have to be who you think they should be! The body of Christ is a very diverse body, made up of many, many different parts. Rest in who you are. Look to God to work in and through you, and to be faithful to accomplish in you all that He has set out to do.
"The body is a unit, though it is made up of many parts; and though all its parts are many, they form one body. So it is with Christ." (1 Cor 12:12 NIV)
The worldwide body of Christ is one unit - one body - although just like a human body it is made up of many different and diverse parts that all have different and diverse functions. The Spirit of God has placed each member exactly where He has seen fit to place them. In the church today, some people feel pressure from other people to function in ways that are contrary to how God has made them to be. This leads to much confusion and frustration, and to a body that doesn't function very well.
There is one Spirit and one Head to this one body, but again, the one body is made up of many different parts. Be who you are in Christ's body and allow others to be who they are. This is how the body is meant to function, and it functions well this way!