Antibiotic Induced Depression

So.  I have been realizing that I have depression and have had it maybe since October.  I started antibiotics in August and I realized I had alot of motivation at the time.   I also had a stronger sex drive too.  So whatever I am taking medicine wise has lowered both of these.  I basicaly sit around during the day and wait for the kids to come home and just read my favorite blogs or lyme stuff or watch tv.  I get the stuff done I have to do but there is definately a motivation change since before taking antibiotics.  I haven't really been consistantly taking probiotics or b-vitamins either.  I only mention this becaue b-vitamins are manufactured in the gut and are necessary for virtually every metobolic function in the body.  Antibiotics, destroy even good gut bacteria and these bacteria are necessary for manufacturing b-vitamins in the body.  So I think I have really done myself in on this one. I am not sad or depressed feeling.  I just feel lethargic, unmotivated, am lazy and unproductive but that definitly is within the realm of depression symptoms.  I am going to try and take a neurotransmitter test and organic acid test to assess these things.  And in the meantime up my probiotics and b-vitamins and see if I turn a corner.  It is basically like watching life pass me by when I just sit around like this. Pretty lame.