I have had a few MRIs (obviously not CTs, but still scans) in the past when I was initially being diagnosed with my illness, so may be able to offer some reassurance.
When I did have something wrong on tests, I've been told within a day or two - incredibly quickly - and the appointment has been made for not long after to discuss next steps. I've never not been contacted, or left in the dark, when something has been present on test results.
When there was nothing found on a head scan, I didn't hear back for weeks, but was given an appointment to discuss moving forward (it was to transfer me for a different test, which ultimately led to my diagnosis) and what they would do to help - this could be what the referral they are discussing is about. The fact that they've put you on a waiting list is good news - this should mean it isn't serious and it's highly unlikely they've found anything; but if you had a CT it means you have pain or some symptoms, and so they could be transferring you for either different tests, a different diagnosis or a management plan.
Everyone I've spoken to also reiterates this - when they found something, the patient knew very quickly. No news is definitely good news - if they had found something or if it was serious they would've contacted you, and it's incredibly unlikely you would be on a waiting list for referral right now. Especially since you were done through A&E - you'd likely have been done as an emergency case, and if there was something seriously wrong, you'd know by now.
If you are still worried, keep contacting the department, or perhaps visit your GP if you still have the symptoms to ask about further treatment options. They did say they're potentially referring you though, which means they haven't forgotten about you and it's likely this will be to discuss next steps to help relieve your symptoms. Hope this can offer some reassurance to you - but I know waiting is awful!