12 to 14 white lights seen traveling east to west over a 20 minute period.

At 10 o’clock at night I went outside to grab something from my car.  I looked up in the sky and saw 3 white lights in the sky, they were all heading towards each other, one was heading south, one north, and the third was traveling west.
At first I thought it was 3 satellites, but then they all started moving east.  I then moved to get a better view as there was a tree blocking part of my view.  Once the tree was out of the way I saw two more lights traveling east as well.  They all seemed to be going a similar speed, about the speed of satellites I’ve seen, but I’d never seen so many satellites at once.  I stood there and kept looking, and more lights kept appearing from the west and traveled east, at what appeared to be similar trajectories as the previous lights.  At this point and went back inside and got my brother, who came out and watched the lights with me.
 They kept appearing from the west and heading east.  Sometimes one at a time, sometimes two.  Some were faster than others.  Then my mother came out and witnessed the lights.  All in, their were probably 12-14 moving lights in total. I don’t know if it was a series of satellites we saw.  Their were no flashing lights, but at one point one light grew brighter for a second then returned to its normal appearance.
At the start, the lights appeared frequently but as time went on their was a longer break between appearances.
This lasted about 20 minutes, and I would like to know if there were any satellites or other known vehicles in the sky at the time this happened. I would appreciate an explanation if there is one.