Postnatal depression? Please help?

I am looking for some advice from any other women out there who have suffered this? I have always been quite a anxious person but since I had my daughter 8 months ago it has intensified. It has been getting gradually worse and I had a panic attack last night (it felt like I couldnt breathe, my mouth went dry, chest pains, dizzy). I just get really anxious for no reason. I have also been feeling incredibly low and down, like I get no enjoyment out of life anymore, I also am incredibly indecisive all the time. I have a doctors appointment booked but I am wary of taking antidepressants as I have heard bad things from others about them. Please, any advice or tips would be very much appreciated.