Stomach aches

Kirsty
Today I feel like Iv done 100 sit ups. I am 10dpo and last month I thought I had every symptom going but AF came along. Now I'm feeling slight cramps over past few days but today is just a dull ache. Either side where my ovaries are. Could this be it?? Hate waiting to test and all the tests I have are 25mlu so need a cheaper one to see in morn if I am. I really feel like something is expanding and that's why I'm getting this feeling.