Can Levlen Cause Depression?

Hi there, I was wondering if you could please help me with the possible link between the contraceptive pill and depression. I have been taking levlen for a month now and have noticed that I am not feeling 100% myself. I am usually a very happy and energetic person but have lately been feeling quite low and sad sometimes for no reason at all and also seem to lack motivation at times I would normally be amped and ready to go. I had a few drinks last night which seemed to strongly magnify my negative thoughts so I am definitely going to steer clear of alcohol while I am on this pill. I used to take levlen in 2008 and noticed the same patterns, I also used to do a lot of vigorous muay thai training and found whilst on the pill I wasn't as motivated and amped as I usually would be in training, so I didn't renew my prescription until a month ago as I am over seas for the next few months and don't want the risk of falling pregnant abroad. I like the convenience of the pill and the reassurance of the birth control that it provides but what am I to do about the low feelings? B