Help – I can’t access my dashboard!

Hello,

I have only just started blogging and I have done something really stupid and can’t log in to my dashboard.
I was trying to set up permalinks for my blog. It was originally in the format: https://www.mysite.com/blog.

My hosting provider uses Windows servers so I couldn’t add permalinks the normal way and it didn’t work when I tried to add /index.php/%postname% either

I then saw a blog saying that it might work if you were to add /index.php to your url, so in the wordpress interface where you fill in details about your blog, I changed the blogs url to https://www.mysite.com/blog/index.php

Now, I can still see my blog by going to https://www.mysite.com/blog/index.php – but all the formatting and templates have gone, along with links, one of which was to my dashboard! I therefore can’t log back into it to change the url back to https://www.mysite.com and get it back to normal.

Please can someone help me correct this? I was so pleased with the blog and have posted every day this month so far and I am devastated I can’t get it working…I just hope there’s a way of fixing this.

Many thanks,

Rachel