A 50 gramms water-cup can weigh twice than that if you hold it for 15 minutes ,and can be 1000g if you still hold it for an hour , and you might need an ambulance if you hold it for two days.
So do not give your proplems more weight than they realy are (by keeping thinking about them all the time) .
Put your problems aside and take a rest there are many important things to be done.