Hi and congrats on your baby.
As for potty training, one word--PATIENCE!
It sounds as though you are doing everything right but it does take time and patience. It will happen one day. I can't tell you if having so many pads down is a good thing or not as I used to have several myself. I am down to 1 in their pen, one in the sun room and one in daddy's garage. There is only 1 inside the house and they only stay on the first level of the house except when we take them up there while we change clothes or for bathtime.
You will really have to watch for signs of Charlie needing to potty and put him on a pad quickly. Try using a phrase for that purpose and only that purpose. You should pick the phrase and say once they are in the actual act. Repeat it several times and praise/treat. They will make the connection and eventually, you will be able to just say the phrase and they will now what you mean. I use "do your stuff". We use it when we pad trained and went outdoors.
Some have suggested keeping a log as to when he pottys. Mine are pretty consistent, they go on our morning walks and at our evening walks when I get home from work. If you are feeding at consistent times, this should be fairly regular. and as much as you want to change the pad, don't...this will give him the idea that it is okay to go there. I used to change it everytime they did anything also but with the pee on it, it has the scent.
As for treating, you need to be strong...I am not either, lol. Chicken and stuff like that should only be given (if that's what you wish) at treat time to ensure they know that is what it is for. They do learn quickly how to hold out for what they want. I created little monsters as well.
A vet once told me that if a dog is healthy, missing a meal will not be harmful, dogs will eat when they get hungry but that does not make it easier. The little ones do need more consistent feedings. Do you have nutrical on hand just in case? Also our vet told us to make sure they eat, put the food down for about 20 minutes and if they have not eaten, then up it goes. I do have to tell you that when mine get fussy, I do pick up what is not eaten and I may do this 2 meals in a row, and by the next meal, they gobble everything up. I don't know what it is lately but my 2 have been eating like bandits, maybe the more exercise now that the weather is warmer. But I have also been smashing up peas in Hot Rod's food and he has been licking his bowl clean! I've been putting tiny bits of chicken in Maggies and she's been gobbling it up! So like I said, I've created monsters as well. lol
Best of luck to you.