1) could be stressed but hes feeding, what is the set up like?

2) there is always a chance of a bite and even if you watch it can happen so fast but if your snake does not accept anything else what can you do

3) 2-3 days after the meal is usually when i start to handle my snakes again

4) depends on how your snake feeds and how he puts on weight, if hes getting fat then cut him back if he looks good and healthy then keep on feeding.