No sore boobs anymore

Hi yall Iam currently 7.1 week pregnant and the only pregnancy symptom I have is slight sore boob , frequent run to loo to pee and tiredness.

I have noticed today I woke up and I don’t have sore boobs anymore .

Yesterday the soreness had decreased .

Also 2 nights I had hot flashes and was sweating .

Iam very worried as not sure if everything is fine or not as I have my USG on 3rd Mar .

Only symptom is frequent peeing , thirsty and very tired .

This is my third rainbow baby

Previous 2 MC at 5.2 and 7.3 week .

Anyone with a similar symptoms