Sooo hungry!!

Claire • Three losses, 1 rainbow baby boy and now we are expecting another sticky bean 🌈❤️
Hi fellow mummy's to be :)
​Has anyone else had a big increase in appetite since finding out they've got a little one in the making? 
​I'm early at 5 weeks but am finding myself more hungry throughout the day even though I have my breakfast, lunch and dinner and 2 x snacks. I drink 3l of water a day so know the feeling isn't thirst. Am just worried that as I'm overweight already i shouldn't eat when my body's telling me to but rather try and ignore the hunger feeling as don't want to end up huge at the end if this through sheer eating....any views? As this is my first I'm not sure about anything! xx