I have a 1998 Honda Civic Ex auto transmission.

I have a 1998 Honda Civic Ex auto transmission that was running, and driving just fine until yesterday. Now, I usually drive my car everyday, but this week has been an exception. My car sat in the driveway for a good 3 days or so. I went to start it and it sputtered when I did. Normally I wouldn't have this problem, but didn't take to it at first. I let it warm up for about 5 minutes, and it ran just fine so I left my house, and drove to the store (which is about 10 miles from my house). It sat for about 15-20 minutes then I came back out and it started the same sputtering way it did before. Noticing this I let it sit and run/warm up again for about 7 or 8 minutes. I then proceeded to back out. When I was backing out of my parking space it started to bog down and sputter. However, the spitting and sputtering did not cause the car to die. I then started out of the parking lot and came to 2 stop signs (one right after the other) and both times I stopped it spit and sputtered but didn't bog down enough to die. After the stop signs I came to a stop light when I stopped the car almost died. I had to put it in park and rev it to keep it going. I left the stop light and went about miles farther and all of the sudden it quit all together when I was going up a slight hill I gave it gas and there was nothing. It shut itself off. I pulled off to the side of the road and tried to restart it. It was cranking like normal and several times it would fire, and bog down then stall out. I've replaced the fuel filter, and I've been told it could be the fuel pressure regulator, the fuel pump, water in the gas tank, timing belt, the distributor timing being off, or a bad injector/s. Any help with this problem would be great considering I'm not that great with cars and all. Thanks