I suddenly understood clearly that there is no beginning and no end; and at the same time, everything is dynamic and static ... Is everything increasing to infinity and decreasing to infinity?

Yes, this is our world. Nowhere are there boundaries as such, chaos is order, and order is chaos. All differences were invented by man, but as such they are not. We and everything around - matter, energy, being. No difference.

Don't panic. Most likely, you have experienced an altered state of consciousness (ASC) experience. You are not the first or the last person to whom this happened. There is even a point of view that the founders of all religions (and perhaps many philosophers) experienced something similar, and their teachings were attempts to somehow express this experience in words. The Russian orientalist and religious scholar Yevgeny Torchinov (and not only him) wrote on this topic, in particular, his book "Religions of the World. Experience of the Beyond." Nevertheless, I do not recommend that you found a new religion, there are already quite a few of them, but perhaps it will now be clearer and more interesting for you to study the existing ones, both Western and Eastern. Especially oriental (Buddhism, Hinduism, Taoism), they are all permeated with this ISS experience.