Quick question

Glow says that im 5weeks 2 days pregnant. Soo excited. I havent told my partner yet. My first doctors appt is on May 2. I had a miscarriage in Feb. For the past week ive been feeling soo exhausted and experiencing very bad cramps/spasm idk what they are, but its happening on and off every few hours. No back pain, no blood. Just brownish discharge in the mornings. Do any ladies know if this is normal?? Im nervous and scared, i dont want this to happen again. Cant wait till my doctors appt. Thank you.