I wouldn't completely go off of a scale in that measurements are a better indication in that the scale only takes into lbs.. now those pounds could be fat or muscle or even water gain (depending upon sodium intake) and how it affects you. personally.. In my case, sodium greatly affects me.
Also, muscle doesn't weigh more..it's more dense than fat and therefore, a
1 lb of muscles takes about 1/2 the volume of fat and therefore, people confuse matters and say oh muscle weighs more... However, a lb of muscle although half the size of fat is a still a lb.. in other words, don't go completely by the scale because it doesn't differentiate between fat and muscle..
I have also found that when I exercise more than I have in awhile, I tend to gain weight at first (which I believe is water retention) and then I eventually lose it..
Sounds like you are on the right track.. keep it up!!
I wish you the best