Also would it be normal for baby to do 2h30 A in the morning then 2h45 A in afternoon?? Or am I getting it wrong somewhere else. She has just woken smiley and wide awake after 30 mins...
My DS always had his first A shorter than the rest of the day, and there are many babies who prefer it like this.
If you increased to 2:45h A time for the second A time then it could be that your LO is still getting used to the new A time. If not then it could well may be that she is UT for it.
You see, 30-35min would usually be OT for most babies but if you say that she is waking up happy then maybe she is UT (some babies do 30-35min *UT* naps...). IIWY I would still leave it as it is for a few more days and if it's not changing then I'd try increasing A time again, but I would increase all of her A, not just the second, because I think her first A is pretty short right now.