Hi there. I am also 7 weeks, nearly 8, and have been having cramps since about 4/5 weeks. No bleeding but they're quite bad (like menstrual ones but lasting longer) and they can wake me up at night. I feel like it's something no-one ever mentioned as a possible symptom but it's practically my only one, and so worrying!
I'm 8 weeks and I've had cramps off and on too. Maybe not every day but it is normal and everyone's different. Your uterus is growing like crazy so you're probably experiencing what's called round ligament pain. As long as they don't last for long periods of time, aren't unbearable, and aren't accompanied by bleeding, as that could be indicative of miscarriage, you're fine. :)