i had an ectopic, i miscarried naturally (lap and dye recently showed my tubes are blocked, so it just couldn't pass...yeah, great mood lifter, not).
never felt anything, they only found out it was ectopic bc my HCG levels didn't drop fast enough after the mc.
my HCG levels were on the low side to begin with but doc wasn't worried and didn't
think follow up 2 days later was necessary.
there is a way to remove it without surgery, they inject you with methrexate (something along those lines, i can never remember correctly),
it also means you can't TTC for 3 months