It must be difficult to see your PSA rise from 0.12 after surgery to 0.22 six months later, particularly when the surgical margin was not completely clear. Hopefully, the oncology referral will help explain what the PSA trend means in your situation and whether further prostate cancer treatment, such as radiotherapy, hormone therapy, or a combination of both, may be worth considering.
The small bowel neuroendocrine tumour understandably makes everything feel even more overwhelming. It may be helpful to ask whether the prostate and bowel teams can coordinate their plans and explain which treatment needs to happen first, as well as how one may affect the timing of the other. I hope you receive a clear and manageable plan soon.