Sounds like you definitely got out a bunch of cholesterol stones. The calcified stones would be much smaller, not so noticeable.

If I were you I would wait until you have regained your strength before doing another flush. It could take many flushes to totally clean out your system.

#1 is normal to have pain after flush and problems with liver function after flush?

I'm not sure what you mean by problems with liver function...do you feel pain? Certainly a Liver Flush can be hard on the system, it can also be very relieving on the system.

# 2 can body weakness and low energy influence the flush to that point when nothing comes out?

It's possible, but just because nothing seemingly came out doesn't mean the flush did not have an affect. It could be that the oil has penetrated into the gall bladder and has helped work to break up any congestion, but no "stones" have been freed. Also...the stool you passed, did it burn? If so then toxins were flushed out which is definitely a good thing.

#3 is one big flush able to get out everything ?

Probably not, take a break and try again when the time feels right.