Early symptoms!

Hannah • Albie, 4/4/17 💙✨
Hi ladies,
So yesterday I found out that I'm pregnant! If my dates are correct then  I'm 4 weeks. I had a miscarriage in 2014 and had a lot of symptoms back then but now I've not got many. I know every pregnancy is different but I can't help worry 😖. I am having stomach ache with some loose stools, is this normal? I read somewhere it is as my stomach is getting bigger and muscles are growing etc .