Constant positive after expiry :s

not sure whats going on
ive done 5 tests over the last 3 days!
the first one i did i was so sure i wouldn't be pg that i actually walked away and forgot to go back and look before going to bed

my hubby found it in the morning with a faint pos line (definately there though)
so i did two more .. which were both def negative within the 10 min period, but sure enough when we came back to them a while later there was a faint 2nd line, this time sooo faint it was questionable if it were just our minds playing tricks..

ive done 2 more since.. the last one was completely neg for a while, well past exp time, but then AGAIN now there is a undenyable 2nd line...
WTF!!
is it something that just happens after a while to all tests, even neg ones? or is this a possible extremely early pg? I dont want to go to docs just yet because ill be embarressed if im not..
What is the likely hood of them all just being funny? Or is it normal.. or is 5 in a row a bit.. suggestive?
Thanks
Kyra

Sounds like an evaporation line babe xxx

is that just what all tests do then? after exp?

I think so. Many of them do, some don't. xx

bugger..
oh well. one can hope :) we wernt trying so its no biggie, but i cant help but get a lil excited over nothing :p
thanks for the info :)

I'd keep testing though hun, maybe wait a few more days?