Believe I got fissures from njoy wand. Advice?

I played with my ass last week for about two hours - njoy wand and aneros. Two days later my asshole is in pain. I used a fair amount of water based lube but might have gone too fast and rushed things. This is probably the worst pain I’ve had in a while. Can any vets give me advice on preventing this in the future and how can I manage the fissures right now besides abstaining? I eat very clean and high fiber to rule that out… much love!