How early have you been able to feel your baby from outside your belly?

Not kicking or moving but like when you press on your stomach and can feel the baby inside. I'm only 13 weeks and there is a hard lump in my lower abdomen. Feels very similar to how baby feels but I've never been able to feel them this early from outside my belly, considering how small they still are. Dr is already closed today but I'm going to go in the morning to have them check and make sure it's baby and not a tumor or something lol not sure what else it would be other than those 2 but surely if there was a tumor or something not suppose to be there they would have seen it by now since I've had 2 ultrasounds. But not sure of it's even possible to feel baby yet, and I never have felt them this early with my previous pregnancies. Any ideas?