Mempool is full: you currently need
more than 12 sat/vbyte for a fast confirmation.
If you're not in a hurry: just wait. Chances are mempool clears over the weekend, and your transactions will confirm.
I tried increasing the fees but then it says:
the server returned an error when broadcasting the transaction. Consider trying to connect to a different server, or updating Electrum
I think this means your increased fee is too close to your previous fee. Note that increasing the fee for your first transaction invalidates the later (child) transactions.
Yeah, when I tried increase the fees and set it further from my previous fee, it got changed
I normally set the fee to 2 sat/b, and it takes around 1 hour to get confirmed. This is the first time I set the fees higher but still not getting confirmation in 2 days
I haven't understood what you said 'Note that increasing the fee for your first transaction invalidates the later (child) transactions'