Did you know that HA is a form of OCD?
When people with "classic" OCD do things like washing their hands repeatedly they know perfectly well that they don't really need to, but there's a very loud, intrusive voice that's shouting "What if" in their heads. They get stuck in a thought pattern that they can't escape.
That's the same as our HA. We know, deep down, that we're very unlikely to have whatever it is that's worrying us - but the voice of the fear is louder & more insistent than the voice of reason in our heads. The voice of reason is whispering, "It's fine, it's fine" but the voice of fear is drowning it out by screaming "But it COULD be ovarian cancer & the doctor COULD be wrong" - and it's virtually impossible to break that negative thought pattern by yourself. Reassurance from a doctor doesn't always work because they can't tell us what we want to hear. There's no doctor alive who could say to you "Choc, you 100% don't have, and never will have, ovarian cancer" - which is actually what we want to hear, right?
It's quite a coincidence but I went through the whole OC fear a week ago. My periods are subtly changing (perimenopause) and are getting closer together. I googled and changes in periods can be a symptom of OC. It then occurred to me that my tummy is definitely bigger than it has ever been before, and I panicked about the bloating thing.
Once I'd calmed down a bit, I realised that I wasn't bloated, I've just put on a bit of weight. My belly is squidgy rather than taut, which it would be if I was bloated.
My understanding is that C-125 results tend to give false positives rather than false negatives. There can sometimes be a false negative that's why it's always done in conjunction with a hands on exam which your doctor did.
Your fear seems to have originated with your ovarian pain. Cancerous tumours don't hurt - it's the effects on the surrounding tissue that causes the pain. So, if you have a tumour that's causing your ovary to hurt, your doctor would have felt it on exam. If it was too small to be detected on exam, then it would probably be too small to cause the kind of pain you're talking about.
AND (important point) the pain is not there now, right? It still would be if it was something sinister. A tumour causing pain will hurt all the time. The fact that it tied in with your ovulation time & is not there now should reassure you massively.
I truly understand what you're going through. If it's any consolation, in the last month or so I've frightened myself about OC, a stroke, a brain tumour and blood poisoning.
Dr Google is not our friend. Avoid him!
And if you ever want to chat privately, please PM me :)