Well the pictures are not very good, but I think you are right, seeds.

Seeds do not necessarily mean it was a hermie, tho that does look very stressed to me. It is possible to get pollen from the environment, from handling bag weed, others who may have pollen on them, a pet has pollen on it, any number of ways. Unless you find male flowers on the plant you cannot say it hermied.

You have lost more than 1.5 months I would think. Just as well harvest now before it puts any more effort into the seed production and decreases THC production along the way.