Donation procedures are fairly minimally invasive. You should be fully recovered from your donation procedure in a matter of weeks. So yes, you should be perfectly fine to proceed with your mommy makeover. Best of luck!
The procedure for harvesting eggs from your ovaries is usually very reliable with minimal recovery. It should not interfere with your plans to have plastic surgery a month later as long as all goes well. I am assuming your egg donation is for another person if you are planning a tummy tuck.