Help multimedia message slowing down phone

[nitchanan_c]

i tried sending 8 or so pictures in the same mms this afternoon and its been more than a few hours since then and they still havnt reached the recipient. is there a way that i can stop the message from sending because it is now slowing down my phone. thing is though i deleted all my messages this afternoon aswell because i wanted to clear space incase that was slowing it down.