Congratulations! Parenthood is loads of fun and loads of stress, but the good times outweigh the bad. Remember that.
1. Your girl: Just do whatever she says. That’s pretty much it. Be there to comfort her, that’s what she needs most. She may get tired and moody, but she still loves you. And soon, she’s going to look all kinds of sexy with her baby bump! Once the baby comes, she’s going to need to rest. A lot. Chances are that you are going to get at least some rest at the hospital, while she is woken up by a nurse every hour to check this, that and the other thing. Especially if she has a c-section, she will need to lie down and rest a lot. Also on the subject of c-sections, and just the birth in general- don’t let her do anything she doesn’t want to do. If something is telling her that the doctor is not making the right decisions, speak up. There is an unnecessarily high number of c-sections, so just read up on it and be prepared for that possibility.
2. Your money: Make a budget and follow it. Don’t run out and buy stuff for the baby yet, other than maybe What to Expect… See if her friends and family are going to throw her a shower. Most of the stuff you need right away can be covered in the shower if you register for it. If you don’t get something you really need from the shower, look at yard sales and craigslist before buying it at the store. Books will tell you that it’s not safe because there might be parts missing, or there could be an old recall on the item, but these things will be obvious to you, so if you don’t see a defect, it’s probably ok. Just look for the newest looking stuff. I know you said you have a good job, but saving money now is key. If not to spoil the baby with, for you and your girl to have some fun once in a while. A small vacation or nice night out makes all the difference. Your girlfriend should consider breastfeeding, not only because it’s the best food for your baby, but it’s FREE food for your baby. Once you start formula, you’re looking at $20 every week or so. I struggled with breastfeeding, but it’s totally worth it overall.
3. The baby: It’s the worst for the first month or so, in my opinion. That’s when they sleep for 1 hour, up an hour, sleep an hour, awake an hour. A good way to make sure both you and your girlfriend are well rested is to take shifts. Allow yourselves a good 6 hour chunk of time to sleep at a time. You’re not going to get this at the hospital, so when you get home, you’re going to be zonked. If you can’t take shifts, sleep when the baby sleeps. About the crying: what does he want? In summary, he’s either hungry, in need of a diaper change, needs to burp, lonely, or tired. Run through the list. Check his diaper. If it’s dry and clean, feed him. If he rejects the boob, try to burp him. If nothing comes out, rock him and sing to him. If nothing else works just put him back in the crib. He may just not be sure how to fall asleep. Another big tip is the more they eat, the longer they tend to sleep. Good luck.
4. You: Try to get leave from work for as long as you can after the birth to help out. Don’t stress about your crazy wife, and don’t stress about every little baby problem. As long as you’re really doing your best and love the baby (and wife) to pieces, everything will work out.
Sorry this turned out to be so long, but it was stuff I wish people had told me and my husband.
Also, like @jonsblond story, I was 4 mo pregnant when we got married. Second trimester is best for this, and try your best to take a small honeymoon together, even a long weekend, before the baby comes. It’s a great bonding ritual. :)