Make an apt. with your vet & take in a fresh stool sample. Your kitty may need a blood panel to rule out other problems. Let us know what you find out.
I love all the kitties pictures in you siggy.
Your best bet is to run a fecal into your vet and have it tested. The cat won't start shedding the tapeworms until late in the cycle. The host worm stays attached to the soft tissue inside and the little worm segments that are shed are segments of the 6-8" worm inside. If your cat has fleas, she has tapeworms.