Hi all, thank you for your responses and sorry for getting back so long. I don't know why I wasn't reading it right at first, but now I see where Nick was stuck. Nick, I made it so you have to enter an address and add at least one product which is weighted (they all have weights and dimensions) to obtain a shipping method. Shipping method should work, as I literally just sold quite a few products to a customer early last week. Maybe make up an address, or a US based address? (the only current shipping methods I have are USPS based so it may not have registered a French address).
I'm not sure why the CSS has changed in my template, I never messed with this part of my website. I've taken a snapshot of the CSS I believe is responsible (I have no idea, I'm not a programmer) by following Jerome's response. Please see the attached image, I hope this can lead you to help me find the resolution.
Also, please note that "Credit Card Owner", "Credit Card Number", and "Credit Card Validation Code" are all showing up really small like that (it only shows the last two of the users inputs).
~Chris