After giving birth to our first son I am about 20lbs heavier than before the baby(it was 30) I have platued and I'm unsure about how to go from here.

Last time I was this heavy, mid 160s, was in high-school and I used the keto diet and general not eating to get down to the low 140s. I'm breastfeeding so I can't go as drastic with the not eating. I also can't use nicotine and caffeine as appetite suppressants anymore.

Any advice on how to get over the hump and back onto weight loss thats breast feeding safe?

Edit: The baby came a whole month early, he's happy and healthy and the delivery was a breeze. We have no medical issues and I just want to get back into my old clothes quicker. I'm not looking for miracles