Please don't take anti depressants you will regret it. Go to www.paxilprogress.org to find others who have taken them and it has caused problems.
You sound to me like you have a yeast overgrowth which can cause depression. How??? Antibiotics deplete magnesium and that can cause depression. Antibiotics also kill your good bacteria which makes up 75% of your immune system. Your good bacteria is what creates your B12. Low B12 causes depression.
Yeast overgrowth also pours toxin's into your blood stream and this can cause depression.
Do the Bowel Cleanses and candida diet, absolutely get off all Sugar and carbs and repopulate your bowels with probiotics, probiotic, probiotics. You will be glad you did.