Aches and pains

lindsey • Sadly lost our first pregnancy on Sunday 13th March 2016 at 12 weeks (baby stopped growing at 6 weeks). RIP our angel. Forever in our hearts xx
So I am just over 5 weeks and I am one big ball of aches and cramps, some dull some sharp. My back aches but I think that might be due to my bra not fitting properly and my boobs aching but nothing horrific and no blood but it's been constant for a week now.. is this normal? When does it stop. How can something so small cause so much?!