Overweight mamas

Backstory.. I’m overweight by about 50 pounds and pregnant with my second child. I’m not trying to lose weight or anything but I do want to try to gain a healthy amount and work on getting healthier. I’ve been eating better, going on walks, etc. but I’m having issues finding information on hour many calories an overweight pregnant woman should be consuming?

Yes I plan on talking to my doctor at my next appointment, just trying to get a general idea.

TIA :)