New to this!

Stacey • 20 year old with daughter at 4:), pregnant with #2
I'm due in march not sure what date yet! I have my first ultrasound on the 25th July & I will be 7 weeks 1 day according to my lmp, I've been having a lot of symtoms but today I've been having mild Lower back pain bare able and hot flushes a lot do any u girls have that aswell??