please respond

my cycle came on Monday 9/11. it was on time, normal cramping, normal flow, etc. Saturday I had to go to the ER with a sharp, stabbing pain in my right side. Me & others assumed it was cysts. It can't be ectopic, right? No positive hpts & they never said anything about my blood they took. X-rays & ct scan, but they claim they couldn't find anything.

Its Monday now & I still feel the pain, although not as serious. Well I decided to take a hpt & opk. the hpt is obviously negative, but look at the opk? does this mean I don't ovulate regularly or is a surge normal after your cycle? should I be BD'ing or don't worsen my chances of making my side hurt?? please help.

fyi, these are cheap internet tests so they never get completely dark. they just usually darken before ovulation (I temp to confirm). normally cd 16-20 is when I ovulate. im 8 today.