One boob is massive :(

[PinkPolly283]

I've obviously been feeding more on one breast without realising, it's twice the size of the other one, gets hard very quickly, itchy, sore and very lumpy.
Anyone know How I go about getting them both to level out? I've had to buy a bloody chicken fillet thing to go in my bra for the small boob as my bras now don't fit properly!

I'd just try and prioritize the other side, where possible. So start on the smaller side first each feed maybe?

If your LO decides to do any cluster feeding soon, make sure it's the other one! But also make sure the big one is getting emptied at feeds.

Actually, just reread what you said about itchy, sore and lumpy, that sounds like engorgement possibly so definitely keep emptying that one - just don't let LO linger too long afterwards!