I think that might be the issue. I didn't play any DS games but i had the dumb idea of trying to run an old R4i card on the n3DS while waiting for my GW card. When i launched the R4i card it gave me an error but it's possible it may have deleted the mset exploit anyways. I wish i had known in this case :/
edit: is it possible to use the bluecard to reinstall the mset exploit? i dont know how the blue and red card differ and since i cant use the red card, i dont know if the blue card would help. From what i researched it seems like the blue card or a ds flashcard would help with reinstalling the exploit? The n3ds has the bluecardfix on it.