Yes I’ve smelled it once, what would make you think it’s pollinated?
That's the first thing I noticed, brown pistils on the top flower too early in flower cycle. That can mean the flower has been pollinated.
I learned this the hard way, just a month ago I was 3 weeks into flower, everything looked great, then slowly the pistils started turning brown, first just a flower or two and then pretty soon the entire plant. The flowers stopped growing, I knew what it was but I kept going just to be sure. About a week later, I started pulling the calyx apart with tweezers to find a seed pod growing inside every single one. Hermie and total loss.
Why did it happen? I'm still not sure. At first, I thought I trimmed too much after starting to flower, and stressed the plants too much. I vegged for 3 months, a month too long, and had way too much excess growth that had to go. But I also lost power right around the same time as the brown pistils started showing up. The power went out about 4 hours into the 12 hour lights on, I had daylight coming thru the window in the room and left the tent open with a flashlight, but it was still pretty dark. The power was out for about 3 hours, after which I put the lights back on to finish the remaining 5 hours of the 12 hour lights on. I knew at the time, and I know now for sure, that instead I should've just put the plants back to lights off once the power went out, and waited the 20 hours until the 12 hour lights on time came around again. The plants need darkness uninterrupted, it doesn't matter if they get an extra 8 hours of dark as long as there is no light. I think I stressed them out by turning the lights back on again.
Sorry if this is a little long. Learn from my mistakes.