What kind of cramping is normal?

4w1d pregnant and I'm just wondering what kind of cramping is considered normal. Mine are mild and on and off throughout the day. No bleeding or spotting or anything. Just wanted to know how normal it was to feel that? My first prenatal is next Monday, tomorrow I go for another blood test to check if the levels have doubled. My HCG was 61.3 and 15 progesterone. I had an ectopic 2 years ago but I had bleeding before the cramping and the cramping was AWFUL. Nothing like this. But still nervous. Any insight??