Sorry for long post - 39w3d & looking for a bit if reassurance

On Saturday night I noticed a slightly pale pink rash across my bump, it had been a hot day and it wasn't itching so I figured it was probably heat rash. Had a bath & applied my usual bump butter before bed.

On Sunday morning I checked and it had definitely faded and neatly gone but by the end of the day had reappeared again - not any worse and still no itching. I had worn the same top as the day before so thought maybe it was the material irritating me (new top). Had a bath & applied my usual bump butter before bed.

Monday morning the rash looked a little faded again - you could only really see it if u were looking for it under a certain light. I wore something different but again over the course of the day it got darker - still not particularly noticeable though and only a little itchy though I put this down to me knowing it was there rather than it actually being itchy. Had a bath & applied my usual bump butter before bed.

Yesterday the rash looked the same but I noticed a red-ish dry patch above my belly button so I started applying E45 throughout the day. I was also home all day so kept my top off my bump as much as possible. By the evening the rash was still barely noticeable but the dry patch was becoming increasingly itchy. Had a bath & applied lots of E45 before bed.

This morning the rash is pretty much gone but the patch above my belly button although no longer red us itching like crazy. I've applied some more E45 as I'm hoping it's just dry skin, but it's all I can do not to scratch right now!

I'm seeing MW tomorrow so will bring all of this up them buy just wanted some reassurance - this is just regular stretching skin pregnancy itching right? Or is there anything else i should be aware of?