Hello,
I was like you, antidepressants get a lot of bad press and I was really scared. Some people get side effects, most people only get very minor ones (dry mouth, feeling nauseous... these usually go away after about 10 days) If you get side effects that bother you, talk to your doctor. There are 20+ types of medication available so you don't have to put up with a medication that has unpleasant side effects.
Can I recommend you read Dr Cantopher's book "Depressive Illness, the Curse of the Strong" as I find his book really explains well what depression is all about. It is not a weakness, it is an illness that is highly manageable and highly treatable. You WILL be able to go back to your normal self, just please don't delay seeing your GP. In the same way as you'd want to talk painkillers if you had migraine, a good antidepressant medication really will give you your life back and help you function as you used to.
Have you done the PH-9 test for depression? Your GP will probably ask you to fill it in, alternatively, you could print a copy and take it to them. Here is a link:
http://www.med.umich.edu/1info/fhp/practiceguides/depress/phq-9.pdfPlease get in touch again if you have any question, it is completely normal to feel scared about taking medication but your GP will be able to give you the pros and cons. Alternatively, do read "Depressive Illness, the Curse of the Strong" and be kind to yourselves.