RANT - postpartum & recovering from surgery

So I am 6 weeks postpartum after an induction at 39 weeks due to pains that I now know is due to a gallbladder issue which I had emergency surgery to remove last Wednesday. I was to the point before the surgery where I was able to handle a daily routine with a newborn and 3 1/2 year old. Now I’m back to square one due to the surgery and my MIL is bitching at me that how I am going to handle two kids when my husband goes back to work. It’s annoying as hell and not helpful! I mean I am breastfeeding a baby, who happens to have a tongue tie which makes feeding hard, and an almost potty trained toddler - who I can’t lift again post surgery. She seems to think everything is a competition and she is always the person with the most pain and issues. I try to tune her out but it’s hard when you live with someone like that.