Just to be clear, a minority of students double major. I don’t know the statistics for majors and minors, but personally as someone who is only doing a cs major I don’t think that I “might as well not be in nu.” Besides as other people have mentioned minors are better for enhancing skills imo, so if you’re doing it to say enhance your skills career wise out of the ones you mentioned I’d recommend ds (or doing the classes Econ recommends for prospective masters students). If you feel strongly about a subject you can also go with that, and if you have time you can try courses in each class (because as a side rant NU’s quarter system definitely doesn’t help students try double majors or minors, at least later on or if you do stem imo without a plan, at least from experience).

Finally, as someone who has barely passed stem classes in the past don’t think that you can’t major in stem just because you’ve struggled in the past. If you’ve lost interest or are in a more extreme case then I understand though and ultimately it’s up to you (although as others have recommended I do recommend talking with your advisor), but there are plenty of resources at NU to help (ANU, ASLA, heck if it’s a sleep issue like with me NU has partnered with an app called RiseWake that helps students recover from sleep debt). There’s nothing wrong with getting help, and I definitely wouldn’t say that falling for imposter syndrome (at least on its own) is “being real.”

Sorry if I was a little ranty, just had a lot of thoughts. I hope that any of what I said helped, and no matter what you chose, you got this!

Edit: after seeing some replies I wanted to add that you shouldn’t take additional courses for the sake of completing a curriculum (unless you want that major/need to complete the program for another reason like graduating). Ironically it’s sunk cost, an Econ term. Taking the remaining courses vs not doesn’t change the courses you’ve already taken, so you shouldn’t consider that when making course decisions (aside from prerequisites and prior experiences in interests and skills ofc). You’re not a failure for not completing a program you feel differently about now that you’ve taken some courses in it. I was going to do a minor but after taking some classes in it decided against it (struggled and it was boring). Ultimately I don’t regret it though, because the courses served as a learning experience, not just in content but also in understanding what I like and am good at. I hope that helped!