Tired of cold showers ugh

Ok so I left the tank valve on all last night and tried to use it this morning for coffee on the stove and it would not work. It definitely had pressure in the line because when I opened the valve yesterday I could visibly see the line kinda move from slowly opening the valve. So I found the closest grocery store and swapped out the tank and lit the hot water pilot light and turned it to the on position. It started the burner and has heated up the tank and kicked off. I also lit both burners as the hot water tank was running and they worked fine also. In a few minutes we will attempt to get showers and see if the water tank burner cycles on and off as it should. So far so good!! Wooohooo!! Thank you all for your help and input!!