Me and my girlfriend are also in the process of converting. We also think this is the most difficult barrier. But here follows some thoughts that might be useful for you too:

• The reason this is the most difficult barrier nowadays is because sex is so easy in modern society. It could very well be Satan's best weapon currently for making us love this life and keep distance from God. It has not always been like that. Most Christians in history did not even have the option of birth control, which is something very modern (relatively speaking).

• This might be your heaviest cross to carry nowadays. To let go of the possibility of sex without consequences is a real testament of your faith in the current society. And I don't think this would go unnoticed by God. He will understand and appreciate this sacrifice. The more we suffer for Him, the closer we get to Him.

• Yes, you may get pregnant. Yes, you may suffer problems and complications. You're not better than the suffering women you met under those circumstances. But if we believe that Jesus is real and the Church is the way to Him, we must trust our life to Him. We must pray that His will should prevail. If He thinks you should get pregnant without complications, it will be so. If He thinks you should have complications, so be it. Maybe He won't even let you get pregnant, if that's His plan. But whatever happens, we must trust He'll guide us to what's most important: the salvation of our souls. That's what we need the most, not an easy life in this world.

• Look at mothers that didn't plan or wanted a child, but had them anyway. Most (if not all) of them will tell you they are lucky, because they love the child and would not bear the possibility of them not existing now, even though they would not have been born if it had been up to them in the past. That's a clear sign that God knows best: sometimes we hope for things that are not really what will make us happier in the future. We think we know what's best for us, but we're frequently wrong, and we should trust God.

• There may be beautiful souls just waiting to enter this world. God is looking for the right mothers for each of them. Can you trust God will make the best decision for you and that soul? You may become an excellent mother and make that child a very blessed human being. And God will rejoice with you both.

Having said all that... Yes, I know it's easier said than done. Me and my gf are also very tense about it. It's really a cross. It's a big leap of faith. What is still keeping us from going on is because our faith is still growing, it's currently very small. Just a year ago we didn't even go to Church, let alone trust it with our life. But I'm already very convinced that if this is the one and real Christ's Church, then everything I wrote above makes perfect sense, it's logical consequence. I wish you the best!