Hello

I have a question about transaction fees. I think I did a transaction for which the transaction fee was lower than the Low Prio fee (mempool.space). It is now +/- $15 and I think I payed +/- $10. That amount was suggested by my app and I accepted it blindly. I did not expect it to be so low. Anyway, the question I have is, what will now happen with that transaction. Is my btc lost in transit forever?

Unfortunate, in my app I don't have the possibility to bump the fee

One final question. As the fee is expressed in sats/vb. How do I know how many vbytes my transaction is?