Aw I know how you feel! One time we had 4 of our girls in heat at the same time... not fun! Needless to say we got all our un-fixed queens and toms sorted asap!
My dog is in heat at the moment and her favourite seasonal past time is whining constantly, we're saving up to get her spayed next.
But I'll tell you what's really annoying - one of our older girls (about 4) got fixed in her first year but still has the hormones running through her, so every 6 months or so she act like a cat in heat, all the mewing and flashing her bits. Then after that she'll 'mother' the younger cats and let them nurse from her

which looks very strange as they're all twice her size! Poor girl!