About a week ago I went to turn my shower on and noticed that when I turned my water on it ran at a very slow trickle then turn on with normal pressure after about 20 to 30 seconds. I have not noticed any problems for about a week. This morning my daughter called me with the same problem but this time the water was trickling out very slow for a longer period of time then suddenly turned back on with normal pressure. We have a well, not sure how deep. The pressure tank was replaced in December of last year. The pressure gauge appears to be holding at normal ranges. It is very inconsistent so I'm having a hard time trying to figure out what's happening. Any ideas?