Hubby leaving for work

Hello everyone!
I just need someone to vent and cry to. My husband is a mechanic at a Toyota shop and is training to be a master tech. He has to take special training courses for 2-3 days every six weeks this year. He leaves tomorrow morning for Cincinatti which is about 2 1/2 hours away. I'm a mess right now. We have 2 kids boy, 7 and girl, 3 plus I'm 34 weeks pregnant. I'm going to miss him and I'm worried something will happen to him. Today has been hard packing his clothes up. I can't stop crying. He is doing this to better his job for his family but I just can't be excited for it. I feel like I'm burdening him with my emotions. Any advice?