How should i feel..?

I wouldnt feel obligated to go with her at all. Because u have an big event which is your wedding the weekend after. That's time and money spent right b4 ur day. Seem as if shes upset...

Maybe just mention her back saying youd love to go, but with it being the week before your wedding its difficult financially and that you are doing last minute wedding plans.
If you are up for it, maybe suggest going a different weekend with her?

I couldn't agree with @Fmv more. Tell her it's financially and timewise very hard on you and offer going out for dinner or drinks to celebrate after your wedding. This is a once in a lifetime event. Also, how is she able to go to Nashville for a birthday weekend, considering COVID?

Is it a financial thing or a time? It’s definitely okay that you don’t want to go or feel like it would be too much right before your wedding.
My MOH made a suggested of going to the NC RenFaire the weekend before the wedding and well if it actually happens and since the Highland Games in Linville, I’m leaning towards us trying to go now. But that would only be if I can get my DIY projects done and I feel like we’re at a good spot with painting our house.

I can totally understand you not wanting to go. timing wise, the week before a wedding can be hectic. however i love pp's suggestion in that you should absolutely tell her you wanna make it up by taking her out another day or something

I think this is okay. It's totally fine that you don't want to go, but also totally fine that she invited you along. The world does not get put on hold because of your wedding, and your bridesmaid doing something a week before your wedding for her birthday is totally within the realm of acceptable. I take her thumbs upping your reply is just an indication that she understands.

Don't go and don't feel guilty. I don't feel that you need to explain yourself either - she knows you are getting married and that's huge! Also don't be upset at your bridesmaid for doing her own thing on her birthday a full week before your wedding or the fact that she invited you. It's her birthday, you're her friend so she wanted to extend the invite, and she totally understands you are getting married and that your time, energy, and money are going to be a bit tight.

Is there anything going on for your wedding the weekend before your wedding? Bachelorette Party? Shower? If so, I'd remind her of that. If not, just let her know that you have things to take care of for your wedding and you hope she has fun!

Unless you want to go. If everything else is done and you want to go, have at it!

I can't tell you how to feel, but I definitely think it's fine for her to plan a weekend away for her birthday and for you to not want to attend.

She is being insensitive with that passive aggressive thumbs up. u have more important things to take care of

The thumbs up does seem a bit passive aggressive, but she's probably just bummed out. I'd respond that you'd love to go and you'd love to celebrate another weekend, but it's just too close to the wedding to make it work. That's a very reasonable explanation and I'm sure the passive aggressive will blow over and it won't become a bigger issue.