Getting frustrated will not help you in getting your next one. You had a lucid dream and you should be thankful for it. Every lucid experience is a great opportunity to better your skills, find out what works, make a plan in your mind how to approach it next. This is a learning process. If you look at it the right way, it can be as much fun as LD itself.

It's normal to gain and then lose lucidity. You can practice more daytime awareness to help with that.

FA is a dream that starts with you waking up in your bed. So that was not FA. It was a normal dream, in which you realized you are dreaming. Congrats!