Felt pain n sore on my whole left leg n near the vagina. It's been 3 days now. Is this normal?

I really feel you on this, being a first-time mum is already so overwhelming and then having to deal with unexpected pain on top of everything makes it so much harder. Three days of soreness spreading down the whole leg and near that area is something I would not leave to chance, especially after IVF, so please do get it checked by your doctor or PD as soon as you can. It could be something simple but it is always better to have a professional take a look just to be safe, and your gynae would be the right person to call first since it is postnatal.