I think a successful transfer to an Ivy is extremely unlikely. Northwestern is a possibility because they are transfer friendly but a lot will rest on how you did in HS vs. your one semester of college grades. Your lack of calculus might hinder you assuming you didn’t take it in HS (and if you did you should be taking Calc 2 or 3). Your chances will be even less if you applied to these schools last year and were rejected - a single semester’s worth of grades is unlikely to change the original decision. Still, you have done well (assuming you actually get the grades you think you will) so it is worth a shot.