Weight loss with meal replacements

Codi • I am the mother to a two and a half year old boy and expecting a little girl on February 28th! 👏💙💜
I'm already planning my weight loss journey...
I failed miserably after my first pregnancy and only lost 20 out of 45 pounds-mostly on the table. This pregnancy I've only gained 15 thus far and I'm almost 33 weeks, I'm hoping around a total of 20. So I'll definitely have a bunch of weight to lose.
 I breast fed my son until a month and a half ago and it didn't help me lose weight. (He's over 2 years old).. 
I'm for sure going to start clean eating but I've been considering meal replacement shakes as well. I've done some research with 18shakes and shakeology. I've also tried herbalife. Has anyone tried anything they recommend? I will probably need to lose anywhere from 25-45 pounds. Anything helps! Thanks 😊