Missy-
Hi girl, i also have two "stubs", and after falling pregnant through ivf i got some similar ache and pains, so i rang my clinic and they said not to worry becayse it was probably my uterus stretching. When i went for my 6 week scan at ivf clinic everything was fine and we even saw bubbus heartbeating so early on.
Try not to worry, because worrying as some funny side effects on your body anyway.
Try to get that scan, in fact insist on it to put your mind at rest.
Let me know how you get on.
xx
Georgette