Dull but constant abdominal pain

Judith
Hi all, I'm 7w4d and since yesterday afternoon I've been having pretty constant abdominal pain. It's a dull pain and not very strong but definitely uncomfortable. It didn't go away overnight either. There's no sign of spotting or anything else unusual though. Apart from a occasional grumbling which makes me think it's more stomach related. 
Unsure if I should make a doctor's appointment or wait for my first US which is booked in two day's time anyway. Thoughts?