Insanim8er - thanks for the advice, I figured it should be fine since everything looked to be normal but with this only being my 4th batch I always seem to worry too much if something seems to be not quite right.
I took a OG reading so I'll give it a few weeks and do what you suggested to...
Brewed an American Pale Ale last Saturday evening (2-8).
By Sunday there was activity showing up in the airlock.
By Monday all activity had stopped.
Tuesday I pulled the lid to take a look at things. Thick layer of krausen present.
Put the lid back on and been letting it sit since. There...