tHanks for all the replies. No they havnt been to vet only had them since last night. She hasn't got mastitis n no signs of infection. She is very happy to be cuddled n have her tummy rubbed, the little one must still be feeding I just know he didn't for 10 hours.
It's most likely because yesturday she would have had 3 kittens suckling n now only one.
It's me just over reacting I couldn't cope thinking she would be pregnant again when she's only a baby herself.
Thanks again