Could it be lyme disease?

Two years ago I went on a camping trip and came back with a few strange problems such as constipation and muscle pain. Over time I gradually got other problems like hair loss, unbalanced feeling as I walk (like walking when you're drunk), swollen ankles/numbness in areas.
I'm only 19 years old now and this happened when I was 17 just after high school graduation... It's been hell for me for these two years and i have been to about 7 or 8 different doctors who have done tons of tests (blood work everytime, colonoscopy, x-rays, ultrasound etc) and they all say im NORMAL. What a crock. At first the doctors started giving me anxiety pills which I took hoping maybe they were right, didn't work obviously. Anyways, I'm here now and have done countless hours of research after a doctor said my symptoms sounded like Lyme disease about half a year ago and boy they really do seem quite similar.
I know you can't diagnose someone who is online and from what they say, but what's the best method to get treated? I've told few doctors my belief of what I have but they take it like nothing, the last one didn't even give me a blood test (I have no insurance). I'm in southern California by the way. Anyone know the best idea for someone in my position to get a decent test done soon? I'm really sick of living like this.