Pregnancy after birth

Libbie

I’m a new mum and gave birth 2 months ago to my beautiful daughter...but I think I could be pregnant again... Iv had a few symptoms like cramping, spotting and whatnot so I done a test but nothing came up on the test..has anyone experienced falling pregnant again after just giving birth if so could you please offer tips or explanation to what I’m experiencing... could I just be regulating?!?