I wouldn't give up on the slimfast.
Its how I lost all my pregnancy weight after having my daughter.
I was 10 stone before having her then went up to 12 stone straight after having her and then breastfeed for a year so lost 2 stone down to my starting weight of 10 stone and went on slimfast to keep it off but lost another 2 stone and stablised at 8 stone.
I'm pregnant again now so will probably put all of it back on but now that I know what works i'll be doing it again after.
Also Slimfast contains a lot of folic acid so if you
were to get caught pregnant whilst doing it it wouldn't matter (although I would come off it as soon as you found out)
Breastfeeding first (but don't do slimfast while doing it)
Slimfast after to shift the rest of it.
Its really hard to stick to for the first week but after that they start to fill you up and you get used to it.
I'd recommend it.
Good luck girls I know you all can do it