Uniswap txn time pending get stucked

Dear all,

I’m trying to buy a token in Uniswap with ETH through Metamask. I summit the txn succesfully but still pending. I tried to cancell twice speeding up with no result. And now I have 4 txn pending for more than 8 eight hours… is that normal if I used a standard gas?

Thank you very much in advance