Thanks so much for your very helpful reply.
Cats have two uterine horns so you may be feeling kittens in each. It is also possible she has given birth or had a miscarriage.
If she is pregnant her nipples will look like this:
I don't think she has dead kittens because if she did she would be quite ill. Since she is eating well and playful this does not sound likely.
Stages of pregnancy:
At this point I would wait and see. Cats carry for about 63 days. If nothing changes in two weeks you can have her spayed. Try to keep her indoors if possible.
Please let me know how she is doing .
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