Do I have a purpose in life?

This is a question that I've asked myself over and over now for the past year. I have had 2 suicide attempts in 2010, the first one was really bad, the doctors were surprised that I even survived. After that of course, I ended up in a mental institution and 6 months later I had another attempt, and again survived. I believe in God, it's is just that I have had maniac depression for all my life, bi polar, anxiety. Now it was a miracle that I survived and that I'm still here, even more weird are weird things that happened to me afterwards. There was in one occation when I was really hungry and I didn't have any money or food, nothing what so ever and by God's grace i found a 20 dollar bill in a cabinet that was stuffed with junk. It was like a miracle that I found that money, I didn't even know I had it. In another occation I was driving in the country and went empty, I had no money, nothing, all this time I kept saying, I TRUST IN GOD, JUST LET ME MAKE IT BACK INTO TOWN and before I got into town, one of my customers tiped me 20 dollars which was very, very unusual, that time out of all times. What do you guys think of all this? I just think that God works in wonderous ways and that I have been a fool and irresponsible animal all my life. Thank you Lord.