Please help so worried

Nicola • Married. 29 years old. Mmc at 11 weeks July 2015 and mc at 4+3 weeks Nov 2015. Pregnant with baby girl due 30.07.17 ♡♡
I'm 11 weeks and for past week have had period type pain and miod cramps which come and go but woke up this morning and my belly feels really hard and mildly painful but very uncomfortable. So scared I'm going to miscarry...tummy feels so sore. Is this normal? Xxx