Yes it can happen if you go to a dr they can give u a u/s to check and take blood tests to make sure the preg hormone is going up not down. They also have to check your bloodtype because it can be bad for bubz if your blood is comin in contact with it not sure why think they will give u an injection for it or something.

Take careand don't stress see a GOOD NICE dr and they'll sort you out :-) best of luck and *big comfort hugs* I got some bleeding too but only half a day and that was scary enough for me lol