Baby's sac

Hayley • 20 years old.. Got 1 child who is 4 September,had the depo shot been off it 2months and would love to conceive.
I had an emergency scan to find out I'm around 6-7 weeks pregnant but there's a bleed outside the sack baby was fine had a heart beat has anyone else had this and it's been fine I'm having a lot of pain in Lower stomach?