shoulder pain = get to the er!
ok now I got that out I'll explain.
shoulder tip pain is commonly a symptom of an ectopic pregnancy and should never be taken lightly.
If you go to the ER and they find that you are safe then that's good, but it's better to be safe than sorry.
corpus luteum does not cause bleeding.
the corpus luteum is the ruptured follicle that the egg came out of.
it produces progesterone which prevents bleeding.
If you have not conceived: as the corpus luteum dies off the progeterone drops and so you get your period.
If you have conceived the hcg prolongs the life of the corpus luteum which continues to produce progesterone and helps keep the pregnancy until the placenta is fully developed and takes over the hormone production.
hope that helps you some hun and good luck