Water pump-very low pressure-need help

I am having a water pressure problem when using my water pump. I do have a full fresh water tank. The problem is low water pressure when using any faucet using the water pump. The problem just started after I sanitized the water tanks. Here is what I may have done wrong. I let the tank drain empty and then turned on the water pump for a minute or two by mistake.

I am wondering if I have introduced air into the system. If this is the problem could you help me with how to purge the air? If not could I have done something to the water pump running it dry for a short time?

I have an accumulator tank in the system and the air pressure is up to specs. I have a screen before the water pump and it looks like there are bubbles in this.

Thank you in advance for your help,

Stuart