I completely agree. Your going too quick. What are your parameters so far in the tank? How long has it been set up and running?
It feels like you put in a raw shrimp and LR, then started stocking stuff the week after. I wish you all the best but your going to crash your tank if you don't take it slow. There is no way that you have a semi established and STABLE bio filter in your tank in 2-3 weeks enough to fully stock your tank with fish/crabs/shrimp in the 4 week period your thinking. I also think you have 2-3x the amount of livestock already in there for the tank. 1-2 small fish, Clownfish are not considered small, and 1 invert aside from your small 5-10 man cleaning crew is about max for what you want in the tank, anything more is overstocking.
I don't feel like getting into explaining the cycle period of tanks or the bio life cycle the first 6 months of a new tank setup. You should read and understand all of that now if you haven't. A simple read and you would see exactly why people cycle their tanks for over 3 months before adding anything, and why your going WAY too fast in your stocking.
If I were you I would keep the tank stocked with whatever you have in there already and let it sit and run for at least 3-6 weeks if not more to let it stabilize. Then slowly add 1 item every week or two afterwards and see how your tank reacts.
Nano tanks are extremely delicate and things happen fast. Especially anything smaller than 20g. By the time you find out you have a problem, like a crash/cycle due to overfeeding and overstocking, its going to be too late to fix or save anything.