Stress!

I need to try to find a way to relax... I've always been a worry wart. Right now we are trying to TTC baby number 1 and we are in the process of buying a townhouse. Our offer was accepted on Tuesday. I'm worried that something will happen and I won't get the house, and I'm worried that I will have a hard time getting pregnant. I also know that stess makes getting pregnant harder and isn't good when I do get pregnant. Has anyone else been in this situation? Can you give me peace of mind that mortgage underwriters aren't as intimidating as I think? My parents just bought a house by had a hard time because they sold a motorcycle a month and a half before and made a large deposit.