In the UK, the next stage would be an urgent cancer referral to a urology department, and they're required to see you within 2 weeks. You would have an mpMRI scan of the prostate and pelvic area. If that shows anything suspicious, this would be followed by a prostate biopsy so that cells can be checked under a microscope, and either cancer ruled out, or confirmed.
You are young, and although prostate cancers are rare in your age group, when they happen, they can be fast moving. So you need to get it investigated without delay.
A DRE will only reveal cancers on the posterior of the prostate, which is the most common place for them, but they can happen anywhere in the prostate, so a DRE is not capable of ruling out prostate cancer.