Breed of my new fur baby? 💕

My family and I can’t seem to agree on what breed my new babe is lol so I thought I would ask here! I think chihuahua/wiener dog or chihuahua/jack russell. I “rescued” her I guess you could say lol. What do you guys think?

She isn’t very big but she is long. I’d say she weighs no more than 15lbs and she is black all over with very soft short fur.