When did you start feeling so big that it becomes uncomfortable?

Now, I'm at the end of my 5th month and I'm starting to find it hard to breathe, wear or remove socks, wash my toes, get stuff from the floor, get out of bed and my back hurts constantly because my front (the bump) is so heavy. It's hard to imagine what it will feel like when I'm further along. When did you guys start to feel uncomfortable because of the growing bump?