Help!

Here’s a list of what I’ve been experiencing because it’s quite long:

-Sharp sometimes immobilising pain in my right ovary area.

-Pink and brown spotting (after sex was heaviest)

-Missed period.

-Mild shoulder pain.

-Dizziness/ faintness.

I’ve been having the shoulder pain, spotting and dizziness for about a week now but the other symptoms only arose last night. I do have PCOS so I am used to ovarian cysts and what they feel like, but my periods have been regular the past few months and I haven’t had any cysts in almost a year. I took a pregnancy test 5 days ago and it was negative. Does the negative test completely eradicate the possibility of an ectopic? Help please!