Discussions

So this is my question....  
I'm dating a great guy and we'll probably get married in the future. We do live together. But I have a paranoia of becoming pregnant. At this stage in my life it would be a complete disaster and throw a huge wrench in my plans....and yes I know that these things aren't always planned!  
Since I fear becoming pregnant, and I have had a few "scares" I have become less and less responsive to my boyfriend. I don't want sex. It can be too stressful even if I use my birth control very carefully. I can't risk it. And believe me, I'm very maternal and would love to have children!  
Does anyone else have this problem or am I just being too paranoid and a prude?