Hiya Matthew, welcome to the DhO,
According to the Theravada models of Enlightenment, I have attained First Path.
Interesting. On what do you base this claim?
I believe that I may have attained Second Path a few months ago, but have been subjecting it to reality testing before saying that for sure, and then these perceptions began to happen.
What causes you to believe that you may have attained 2nd path?
Your description doesn't sound like 3rd path but it's difficult to say much more without knowing your background in meditation, how your practice is right now and what sorts of things you're observing during a sit.