cramps and blood

Angie
I took 2 tests one on Wednesday and one Thursday both positive. According to this app I'm 4 weeks and 4 days. This is my 1st pregnancy so my questions are...... 
Is it normal to experience mild period cramps off and on? 
If I keep checking my cervix for cm could I have irritated it to make it bleed? 
I noticed light spotting when I wiped but when I checked physically it was like brown red raw egg whites. When I went to the bathroom again and wiped it was just like dried up dark brown blood. Please help I'm so scared it's a miscarriage