First Pregnancy

Katie
Hi everyone! I just found out that I am pregnant!!! Due date June 22, 2016 my husband and I are beyond excited. As I am on my 4th week is it normal to feel cramping on and off? Tender breast? I asked my OB she says it's completely normal since it's just trying to adjust to pregnancy but would like to know if there are some out there with similar symptoms? I worry about miscarriage and scared that could happen!
Congrats to all the ladies (and gents) that are due June 2016!!