Will the transaction fee will high if I send small amount under $50
You can but, it's impractical at this point as the fees are very high,

You can used viabtc as someone suggested, but you have,
Paste or enter the TXID you want to accelerate. The volume of a single transaction must be ≤0.5 KB, and the transaction fee rate should be ≥ 0.0001 BTC/KB.
https://www.viabtc.com/tools/txacceleratorIf there is failure error it could be:
Out of quota: 100 FREE transactions are supported per hour. Please resubmit your TXID at next new hour (e.g. 13:00 sharp) or use Paid Service if it surpasses the hourly limit.