Hi, Welcome to JustAnswer. I am a licensed veterinarian and I'll be happy to advise you. The best of course would be to have her seen because it really isn't normal for her contractions to just stop without producing a kitten, and to have her seem very comfortable and calm.
Is she healthy and normal in your opinion? Has she been eating well? Is she drinking water normally? Is she urinating and defecating normally, and breathing normally? If all this is normal, and if the color of her gums is pale pink to pink, then she is probably fine for now. If there was a kitten stuck in the birth canal, Cola would not be comfortable!
I would have her seen tomorrow, however, to get a diagnosis of her status, and possibly to give her some medical assistance to strengthen her uterus. The good news is that most cats can deliver their babies without any difficulty unless Cola is a persian type cat or has had a pelvic injury.
It's about 12:30 AM there (I'm in California), so if you are still up, I'll be online for several more hours. Hope to hear from you!
That probably wouldn't start the contractions again. . .but it won't hurt either. I'm glad to hear that she is healthy.
Have you had a vet diagnose her. . .is she definitely pregnant?
Sounds like she is lactating. This will usually occur up to 2 weeks prior to queening.
It really is not normal for cats to have contractions and not produce kittens. Is there anyway that Cola delivered somewhere hidden from you?
Not in these nesting areas, anyway. Could she have had them elsewhere in your home or even outside?
There would not likely be any remaining bloody discharge. Sometimes there is, but not usually.
Hmmmm! Something else that could happen is called a pseudopregnancy. Cats' hormones after they mate are actually the same whether they become pregnant or not. . .it's just a matter of degree. In pseudo pregnancy they can become engorged in their mammary glands and even lactate. But the contractions aren't usually part of this. Was she yeowling when contracting, at least at first?
Also, want to say that she sounds very stable for tonight. She may not have a viable litter, but it doesn't sound like she is in any danger tonight.
Is she still making these noises, and can you describe them? Also, could you please tell me the color of her gums?