Stay patient. What I've been told from my instructor and friends who are low single digits is improvement comes in waves. You'll see your scores drop, then go up again, then drop more, then up again, etc. The important thing is recognizing where the improvement is needed and devoting lessons and/or practice to that.
Final piece of advice... My scores dipped below 100 once I made a serious commitment to practicing short game often. All of it from 100 yards in, including putting. All of the people I know who are awesome golfers were insistent on this, and they are right. Get chips/pitches within one putt range, eliminate three putts, you'll be good.