7 weeks Pregnant lots of questions

I'm 7 weeks pregnant and as I have never had a baby before am very confused about what I'm feeling.

Boobs sore already and getting bigger by the day and non of my clothes are fitting me either.

I'm so tired I could fall asleep eating my meals some days.

Anyone know any good places for maternity clothes and also do I start wearing maternity bras already or just get re sized??

Hi and congrats.

I didnt buy maternity clothes as i found places that i normally shop in (new look, dorothy perkins)didnt do mat clothes for fat folk like myself (around size 22/24) so instead i bought joggy bottoms and found comfort that way. I didnt see the point of even checking ebay either cos i didnt see the point of pay 30 pound on clothes that i was only gonna wear for around 6/8 months or so. But thats just me.