You'll be outnumbered! Congrats. Glad you are feeling good. A daughter would be nice, but three boys would be good company for each other, either way, as you say, would be good. One thing is you could find more little kid clothes if you have a girl. Ever notice how 60-70% of the baby toddler clothes area seems to be girl clothes?
So, here's the aspiring nurse in me- you should try to eat an egg a day and some fresh, not canned fruit, and lay on the couch for a rest during the evening.
Will be looking for updates, I am excited for your family.