To that end, to comment on what Trumpetnick said about not having excuses, this is why I developed my maintenance routine. (which still shifts, depending on what I need to work the most) I'm a busy guy. I've got the whole 9-5 job, husband, father, homeowner thing going, which is on top of playing in 2 different bands on two considerably different instruments. I have to have something I can do with the time I've got, and I've gotten to be pretty disciplined about how I approach my practice.
While none of that addresses the main issue of why the OP seems to be regressing, it shows that dedication and discipline can help you find the time and the tools necessary to get it done.