generally, heavy bleeding = A&E
pain, abdominal or shoulder = A&E
light bleeding = go to EPU as early as you can, or go to GP as early as you can, whilst monitoring it using only pads at home
really depends on individual circumstances and gestation
'expectant management' is often advocated, and usually less stressful for the patient
though of course early medical advice is always necessary- and mynadvice would be, to err on the side of caution and go to hospital.
But yes a lot of people find it better to manage it at home, as long as they are well aware of symptoms and are also monitored medically afterwards to ensure no complications.