Website Crazy! Can’t log in to Dashboard…Help!

Ok, let me just boil down the history here (i apologize in advance, i am new to this whole thing):

I built my own website in Dreameaver, and it was terrible. So, a guy set me up a wordpress account, showed me how to use the dashboard, plugins, etc, and i made a new site. Now, the old site was at domain name: https://www.matturmy.com – and the new website was set up at https://www.matturmy.info.

matturmy.info was listed as a subdomain to the hosting for matturmy.com, and the matturmy.com domain was forwarded to the matturmy.info/muwp.

everything was working fine until i called godaddy, the hosting, and asked them how i could hid the “www.matturmy.info/muwp” in the address bar so it would read, “matturmy.com”. –turns out all i had to do was forwarding with masking….but the tech guy i talked to had me going through the DNS and Nameservers and typing in different IP Addresses. Then he told me to go into my WP dashboard and change the site URL in general settings…DOH!…so that sucked, and i couldn’t get into my dashboard. So, i followed forum instructions and went into my database PhpMyadmin and changed the site url back to matturmy.info/muwp…still can’t login. and now i’ve talked to 3 other tech guys at godaddy.com, trying to fix what is wrong…all this to say. the website is screwed up, and i still can’t log in to the dashboard. i’m lost. pissed. on tour, and need to have this website back up as soon as possible!!!!!

HELP ME PLEASE!