Congratulations!

I'm not sure on your macros question, but as far as eating 4 meals a day, I think that's a pretty good start. I would say stick with that but listen to your body. I'm not sure how bad morning sickness will hit you and/or how hungry/tired you will feel, but just go with it and log. The general recommendation that is passed around on here is to set your MFP goals to maintain for the first trimester, then +1/2-lb/week for the second, and +1-lb/week for the third. At your weight and seeing as you are still in the obese category, 1500 calories is probably too little. (I started out at the top of "normal" weight range, and my maintenance was 1700/day.) So you may want to up your calorie intake a bit (it might help with any fatigue you're having) before you talk to your doctor.

But yeah, don't ignore hunger. That doesn't mean you need to eat cake every time you feel hungry, but don't ignore it - just have a healthy snack and then don't sweat it! I found fruit to be the most satisfying thing throughout my whole pregnancy this time (I'm 38+ weeks), and what fruit I desired changed as I progressed. At first it was all citrus fruits, then it became berries, then apples and pears, and now I'm into peaches, which are thankfully coming in season here! (I think part of the peaches thing is because I am thirsty all. the. time. these days, and, well, good peaches are incredibly juicy.)

As far as protein shakes, I would ask your doctor, but either bring one with you or take note of the ingredients. I quit on protein shakes/bars only because I wasn't sure what protein sources were ok. I know a lot of people here continue to drink soymilk and stuff (personally my stomach can't handle certain soy products), but I thought I remembered something about limiting soy protein while pregnant. I could totally be imagining that, though, which is why I say ask your doctor! I prefer whey protein, but that's just me - and I just figured I'd get my protein from "normal" sources while pregnant to be safe. But that's just me being overly cautious. Honestly I haven't craved protein bars or shakes the whole time until this past week, so I bought some shakes that were on sale at Costco but have put them aside for postpartum use when, as you know, it's hard to squeeze in a meal (especially a one-handed meal).

Congratulations again, and best wishes! You'll find a lot of support here - the ladies are wonderful and very non-judgmental! From what I understand, not all pregnancy boards are like that...

There is only one part that I can help with:

Also are protein shakes safe while pregnant?

My doctor said protein shakes are very controversial during pregnancy mainly because the protein sources can be chemically derived/altered. She recommended only organic non-soy protein shakes. Since I decided I'd rather be safe than sorry, this is what I switched to: http://www.gardenoflife.com/Products-for-Life/Foundational-Nutrition/RAW-Protein.aspx

Obviously this is the opinion of one doctor, so I would highly recommend bringing this up at your first appt.