In a rut

I just can't seem to get out of my rut and this rain day is making me feel more blah.   I constantly have a headache on and off for the past week and I just feel so tired/drained.   I am trying my best to hold it together and be a good mommy to my son, which he does bring some happiness to my life.  I am hoping to take a leave from work because the thought of being around other moms and their babies and trying to put on a happy face just seems impossible right now.  I just wonder when I am going to start feeling better?