If you're still using blockchain.info wallet, then I'm pretty sure your problem is going to be low fee related.
AFAIK, binfo still haven't fixed their broken fee calculation system. Recommended fees (
https://bitcoinfees.21.co/ and
https://btc.com/stats/unconfirmed-tx) are still well over 300 sats/byte and I suspect binfo are still using 120 sats/byte...
Go use the ViaBTC TX Accelerator... and for the love of bitcoin, STOP USING BLOCKCHAIN.INFO!!
Steps to Transaction happiness:
Step 1. Go and download latest version of Electrum and make sure that "Use Dynamic Fees" is on and ReplaceByFee is "Always" (Tools -> Preferences -> Fees)
Step 2. Send transactions with proper fees
Step 3. Be happy your transactions don't get "stuck" for days