I know I can't ask for medical opinions here but don't think this is serious enough to go to the GP atm but could do with second opinions.
Woke up this morning and felt like I had something in my belly button, felt and immediately felt this thing in photo below. I really feel like it's only just appeared but to be fair I don't often randomly feel my belly button, I wash with a shower puff etc so it may have been there for ages and I wouldn't have felt it, can't be sure. I'm a little overweight and have put on a small amount of weight recently but not massively so. It feels like it's made of normal skin, rather than being a big spot or something, and is quite firm but not hard.
Is it the inside of my belly button and I'm so chubby it's heading outwards or something else?