baby manual, please

oooh we've had a tough week of night time 'sleeps' from cleo.... don't tell me this is the attitude we can expect from her, now that she is a big one year old?! :o thankfully last night was a 'sleep through', but oh.my.goodness... the previous 6 nights have been so tough, with (literally) hours of cleo crying. inexplicably. horrid. she had her 12 month immunisations on monday morning, but saturday and sunday nights were very unsettled, so can't 'blame' the needles. i took her along to the GP on saturday morning, to check ears, throat, chest - all clear. shrug. i just don't know. all i DO know is that i am tired. very tired. me fighting off a virus doesn't help matters. the other thing is, cleo is fiiiine in the day. my last thought = separation anxiety... but even then, why would she cry even when in bed with us?! argh - someone pass me the manual!