I think that if you've noticed a correlation between low mood/the feelings you describe and the missed doses...that you have your answer right there. Therefore, you don't need to worry about
slipping into a depressive period, as you have seen the cause and effect evidence.
How long have you been on your A/D? This also could be the issue...as start up can be rough in terms of exacerbating (temporarily) the anxiety and/or depression.
Definitely bring this up to your therapist and maybe even your prescribing doctor to get their input as well.
Focus on your coping skills even more at this time as well...and keep us posted, so we can keep your encouraged!
Peace and progress.
"Courage is not the abscence of fear, it is feeling afraid and doing it anyway!"
"Worrying does not empty tomorrow of its troubles...it empties today of its strength."
Corrie Ten Boom
Panic Syndrome recovery due to CBT