My cat went into labor around 2:15 this morning. she had one about 2:30 and another at about 3:30 a.m. two kittens that's it so far and it is almost 8 p.m. should i be concerend??? or can there be two kitten litters? she has not been in any distress and is taking care of the kittens is this normal?? thanks everyone!!!!!