Embarring question.... bowel problems?

For the past 3 months, my bowel habits have changed. I went from being consistently normal to being constipated, then pencil thin, then small, then soft and shredded. At first I thought it was the Jamba smoothies or the milk I that I was having for breakfast (that was changing my bowel pattern). So I stopped consuming them. But I'm still having the same problem. I have no pain, no sudden urges, no blood or pus and no bloating or gas. Just weird bowel patterns. My diet is nutritious and well balanced and always includes fruits and veggies. I am female and 48 yrs old. Has anyone else experienced the same thing? I don't have insurance to see a Doctor so any advice is appreciated.