Hey @pochat , the screenshot you have showcased is the plan for your Webflow Account. AFAIK, CMS plan is a Hosting Plan and you have to go into your Project Settings, under Hosting and select the CMS Plan which gives you 2000 CMS collections.
In this Hosting Tab, you will see the Hosting Plans and one of them is the CMS hosting plan which you require. You need to pay for this. The other one you paid for is not necessary since you only have one site and therefore you can contact support to get that refunded.
In order for the CMS portion to be built, you have to select a hosting plan regardless. Later, when you are ready to launch, you have to add your custom domain which can be found in the same section after you scroll below.
My recommendation, since you are on a tight time frame, is to pay for the CMS hosting so you can continue building, but send in a ticket to have the Lite Account payment to be refunded. You can explain the situation to the Webflow Support and I am pretty sure they should be able to help you out since it was a misunderstanding.