I know it is hard to question feeling a kitten, but I believe if you feel again in the morning, you will be able to feel that the uterus has shrunk more, and that you aren't feeling another kitten. We just went through that with Lucy's kittens, they are 8 weeks old now. The day she had them, I really believed there was another, as did my husband. We took her to our vet, an hour before he opened...(luckily our vet is amazing), he took x-rays as well as palipated, and it was her uterus we were feeling, as well as her bladder, which was full.
Has she urinated at all after her kittens? I think if you are still worried in the morning, then of course take her back to the vet, but it is just so risky to take Momma and babies to the vet at this age, unless it is absolutely called for. I always worry about germs and such.
I hope that Hope continues doing good, and her babies as well. They are so adorable. I am in love with September!! Are you planning on keeping any for your breeding program, if one turns out to be breeder quality?
Congratulations for Hope and you!!! You are an official GrandMeowmy now!!
I look forward to seeing more pictures as they all grow!!
Give Hope a gentle bellyrub for me, and tell her she did a great job!!