netti pot anxiety

Just used a netti pot due to sinus issues and I'm anxious because
A) I used tap water ( through my PUR faucet filter and microwaved the water for 2 minutes) was that enough? 
B) a little water went down my throat and I swallowed it 
C) I got water in my ears
Never using that again but I'm worried that those 3 things were harmful, especially A , can anyone put my mind at ease?