I'm 15 weeks and was lying on the sofa with 2yr old DC getting him off for his nap. The phone rang so I rolled onto my back to grab it and DC got excited because he loves the phone. In his scramble to grab it out of my hand he managed to jump on my tummy with both feet. He literally jumped on and then jumped off but he's not exactly light and I was flat on my back, I'm a little bit worried he might have damaged something. I've not got any pain. Can I get some reassurance please?