PET Scan, ultrasound, ca125

The doctors did a PET scan on me in October 2004 that showed something on the left overy, then they sent me for an ultrasound, then a second they have gone back and forth with its a follicle or cysts. the last being a cyst, then they did i guess the ca125 which they said was normal. I am totally confused since they have done so many things, I don't know what to beleive. I do have pain on the left side at times that can radiate to the back, I always feel full and bloated, pain during intercourse and at times I feel like my whole insides are going to fall out. My doctor says to wait 3 months and do another blood test. Should I get another opion or just wait it out with my doctor? I know some of these are symptoms of ovarion cancer.