Are these seeds forming? Should I be worried

No, they are not seeds, the are female "pre flowers"/primordia and totally normal. All cannabis plants have these growths appear a few weeks before flowering commences and what you are seeing are swollen/enlarged female calyxes that are by now a lot larger than the fresh, newly growing calyxes that are forming in your plants true flowers. So, no need to panic, worry or do anything, your plant is going through her normal growth processes. Good luck and it is certainly refreshing to see a plant growing in its natural environment, outdoors and enjoying sunshine! Hope this helps,... Organoman.