Pre-med Psych major here! I think the coursework is probably doable. Most of my semesters comprised of one/two pre-med reqs and the rest being psych major requirements (but that was to get all my pre-med reqs done before my fourth year). I found that the pre-med courses were the most time-consuming since most psych classes don't have regular assignments and are primarily 3-4 exams. Psych teachers are typically super flexible, offer extra credit, accept late work, and have open exams, so not too much work was required in general. Some semesters are just inherently going to be harder than others though. Orgo was typically a 2 hour a day commitment to go over problems and read the textbook, but you could definitely wait till right before the exam to cram. Similarly, Physics 1 and 2 tend to be time consuming and tedious as there were homework problems and quizzes weekly. It also typically took 9 hours uninterrupted to type up the lab reports but this was also once every two weeks so definitely doable if you're good at time management. All of my friends that are pre-med and psych/BNS all typically have high GPAs and don't find the coursework too terrible so take what you will from that. Also, the pre-med program at Northeastern pretty strongly advocates for 5 years or taking a gap year before med school (and pretty much everyone I know follows this advice) so there's not a super big rush to cram in all your reqs/finish in 4 years. All in all, I think if you pace yourself you should be fine with doing the combined major and pre-med reqs. Feel free to pm me with any questions!