Fear of miscarriage bc of cramping

ebulger

My expected period was yesterday and I took a pregnancy test that showed a positive result. I am very nervous because my husband and I experienced a miscarriage a little over a year ago with our first pregnancy. For about 3 days now I have been having a mild dull ache/cramp in my abdomen and lower back. I know it's best to stay stress-free but that is near impossible. I am calling Monday to talk to a dr. and let them know what is going on. I just wish I could know if this will be another miscarriage. I do have tender breasts and have had some faint waves of nausea. Last time I was pregnant I felt no signs or symptoms whatsoever until I started bleeding and had cramps. Sorry I know this is long but any suggestions on whether this abdomen/back ache is normal at time of missed period?