Undecided Question

Itchy red rash with spots 33 week pregnant?

it started on my legs and has gone up my stomach and down one arm in the past day, what could it be? its so itchy its keeping me awake at night. A doctor (not my normal one) said it was eczema but iv never seen eczema like this and the oilatum and e45 are making my skin sting.
When i itch it also stings but i cant help it!!

Sometimes it feels like i have something crawling on me. Iv not had any antenatal care for 4 weeks so no tests or BP done (very annoyed) anyone????

I have also started itching in places where i dont have a rash. its so uncomfortable!