No It's not abnormal for life to get in the way...that's one of the contributing factors to so many divorces today. People pay too much attention to everything else going on and not enough attention to their marriage and that's why you have to make your M a priority in your life. You have to maintain your M just as you maintain the house, the car, the yard etc. and that means making your H feel special, loved, wanted...and for him many of those things may be tied up with the emotional connection that comes with ML to YOU.
You cannot take care of everything else and put your M at the bottom of your priority list and expect: #1 Your H to be happy w/the state of things or #2 Your marriage will survive, it won't.
I would definitely speak with your Dr. to find out if there are alternative medications to Prozac for you...tell him/her that you are experiencing no sex drive and it's causing problems. I believe there are other problems you two need to address and the counselor will help you with those, but discussing the problem and your medication is also a very good thing to do.