This happens regularly for me, especially after an extended time of closeness with God or our Holy Theotokos. It's kind of predictable: The heavenlies then the desert; the full and then the empty. I try to remind myself that faith is my walk with God in spite of things like my emotions or things going smoothly. One thing I am doing different that helps me get through is that I actively thank God for everything. For the silence, for the lonliness, for time of stillness, for provisions, for busyness, for aches and pains, for the annoying neighbor, for my family who are not supportive of my orthodox walk, for my trials. I just use my desert time to list everything. Thankful. Grateful. Praising our God. I remind myself that He will never leave me nor forsake me, that God is not willing that any perish, that I entrust myself to Him and say the Jesus prayer and Rejoice Virgin Theotokos. I just try to walk forward through it like LizaSymonenko says above^ sometimes I'm really bad at doing it though and forget everything. Then I thank God. That's my one key through it. Thank you God for this pen, paper, air, a job, thank you for your love and grace and mercy. Thank you that you have this all planned out and I don't have to worry.