Hi, it's surprising that they only do psma scans at psa of 2. I've read that having treatment much earlier is more likely to be successful. My hospital said they'd refer me to Oncology at 0.2 and a psma scan at 0 5. They also said patients get private scans and they'll use them.
There are probabilities on line for what might be found at different psa levels. A single lesion could be seen well before 0.5, much lower in some cases, but the more it's divided the less probable it will be seen. If you're paying yourself I'd be trying to get a scan now, although if the hospital refer you and you are confident they will then you could stay with them. You need to keep them on board I'd feel you know. I haven't read your profile as yet so hope there isn't some other factor All the best Peter