Should I worry?

I agree with your physician who suggested route of A.S. and that it is unlikely to get worse.

You have a 3+4 which is the low end of Cancer.

3+3 in fact is not thought of as cancer.

You have nothing to rush into.

I see you may consider radiation. Note that there are 2 forms offered: high dose over a short period eg 3 or 4 sessions versus low dose offered over 5 or so weeks.

Good luck.

Hear what the oncologist suggests.

Then think it over.

You have no need to hurry.

John, I had a similar diagnosis over 2 years ago. My PSA was 5.7, biopsy showed 2 out of 12 core samples with cancer cells. It was adenocarcinoma which the urologist said was a slow growing non aggressive type. My Gleason score was 6.5. I had time to think about options including A.S. I met with an oncologist that works along with my urologist. He talked to me about treatment options. He drew diagrams and charts showing me the pros and cons of each treatment. He also talked to me about Brachytherapy along with other options. Radiation treatments that would be short daily treatments for 32 visits. Another radiation treatment was called the Cyberknife. That was 5 high dose treatments at 45 minutes each. There is some preparation for each visit too for the radiation treatments. The Brachytherapy he told me was a one time treatment done as an outpatient. It takes about 45 minutes under anesthesia. They implant low dose radiation seeds into the prostate. And over a period of a few months, the radiation does it's job and the radiation is gone. The positive side to this treatment is that the radiation is low dose, so less chance of burn surrounding tissues like the colon and bladder. I liked the once and you're done option so I made the decision to have the Brachytherapy and be done with it. As with any treatment, there are side effects. And I had some with this treatment. Ibuprofen helps with the discomfort. And I took Flowmax before the procedure as preventative to keep the urine flow. The radiation causes some inflammation to the urethra. I also took Avodart for a while. After 6 months, all was pretty much back to normal. After the year mark it was like nothing ever happened. I don't take the Avodart or the Flomax any longer. .. which is great. No incontinence, no erectile dysfunction. My PSA at last check a couple of months ago was 0.14. If you can go for the A.S., that is good. But if you decide on a treatment, make sure the doctor is experienced and has performed that procedure many times successfully. Good luck to you.