Every good gift and every perfect gift is from above, and cometh down from the Father of lights, with whom is no variableness, neither shadow of turning. James 1:17
Therefore, everything that we have good in our life is from the Lord: our spouses, our children, our homes, food, water, rain, friends, family, mountains, lakes, oceans, rivers, the ability to work and make money, gifts, talents, etc. He is our Heavenly Father and He blesses us in so many ways including the big ones such as eternal life, freedom from sin, the Law and condemnation, grace, mercy, patience, love, mercy, etc.
One of the specific blessings He mentions in His Word are children.
Behold, children are a heritage from the Lord, the fruit of the womb a reward. Like arrows in the hand of a warrior are the children of one's youth. Blessed is the man who fills his quiver with them! He shall not be put to shame when he speaks with his enemies in the gate.
All of the old-time preachers were adamantly opposed to the use of birth control as was the church. They understood the blessings of children and saw where birth control's roots were coming from - very wicked places. Are we like the frog in the pot that is slowly heating up so we don't notice when it is boiling? I have heard that the church is just ten years behind society. Is this another place where we have compromised with the world and its ways?
What other blessings from the Lord would you try to prevent and reject: food, money, clothing, houses, wealth, the ability to work, etc. I don't think anyone would reject any other blessings the Lord wants to pour down upon us except children. Therefore, I am not going to tell you whether or not birth control is sin because I honestly don't know, except for the ones that abort children. They are sinful. There are many who believe it is a sin to use any type of birth control and should allow the Lord to bless them with many children. There are many others who believe in using some type of birth control to space their children and have only so many. The final decision is between you and your husband. I encourage you to search the Scriptures and pray about making a decision on this important subject. Research the implementing of birth control in America and decide whether or not you believe God had a hand in it at all since it has led to promiscuous sex, numerous sexual diseases and abortions. One thing I do know for sure is this world is in great need for godly offspring.
In closing, we were having a discussion about this in the chat room and one woman who is pregnant with her tenth baby wrote this to a woman who is struggling with the concept of not using birth control, "God uses struggles to shape our character. God has used the struggles of pregnancy and the demands of mothering a large crew to shape and mold me. It has changed my entire life and what I value. I think today so many of us want an 'easy' life free from pain, suffering, and inconvenience. I know where you're coming from. I spent many years there myself." As believers in the living God, we know we walk on a narrow road that leads to eternal life. We are asked to deny ourselves and be living sacrifices for Him. One way we can do this as women is to give our lives to the children the Lord may bless us with and training them in the His ways.
Notwithstanding she shall be saved in childbearing,
if they continue in faith and charity and holiness with sobriety.
1 Timothy 2:15