Second pregnancy and feeling baby

[Alexxx17]

Hi all, I'm just coming up to 16 weeks with no.2 and while I've been feeling early flutters on and off for the last couple of weeks there's been another thing going on this time around which is totally unexpected: I can actually feel little body parts already, hard lumps and bumps sticking out, and I know when bub's on my left side because there's an obvious hard lump and I have a very uneven bump when lying flat. Anyone else felt this? My tummy muscles must be totally shot for me to get this so early on, surely?! Please tell me I'm not going mad and there isn't an alien in there.