I'm going to go against the grain and say if you're sure, really sure you want this then do it. You spend a lot of years working, it might as well be a job that inspires you.
I'm a hospital junior training in emergency medicine. I echo a lot of pps- the hours can be pretty grim with stretches of 12 days in a row including a weekend of 9-9.Tthere seems to be a universal lack of respect for doctors as people by management. Traditionally juniors were single and in their early 20s and pretty much treated as a commodity. It's hard changing that mindset. You can be moved with little say eg the west mids deanery stretches from Stoke to Hereford. You can put forward a case for remaining near dependants though.
Re the poster who compares medicine to business in many ways you're right and I'm working hard to shake off the victim hood because ultimately I'm very privileged to do the job I do, and overall I like it.
What's not really comparable though is the emotional pressure. Covering general medical wards out of hours means 12 solid (usually without a break) hours on your feet rushing from one task to the next. It'll be a mix of stuff-sorting out the best antibiotic for a patient-deciding if someone else is well enough to go home-attending a cardiac arrest-reviewing someone acutely Ill-speaking to an angry relative who wants to blame someone-admitting new patients. In most of those cases you have the potential to make a mistake that can injure or kill someone. And each new job needs to be greeted with a smile. Because the sick man doesn't want to know you failed to resuscitate the patient in the next ward, the person going home has their own commitments and doesn't need to know you haven't eaten or peed for 9 hours. The new patient is worried about themselves, not whether the sick person has improved with your interventions. It's draining and rewarding in a way no other job I've done is.
I did a 4 year course in graduate entry medicine at a pbl uni. It's hard but manageable, I didn't have my children until I'd been qualified a few years. Having DD at uni will make it harder. Having kids during training is mind melting (it's still relatively unusual for juniors to have kids so most hospitals struggle a bit with the organisation of it. My mat pay eg has been wrong twice, organising a return to work felt like an Olympic achievement). My partner is a sahp. I don't know how people organise childcare around 2 jobs.
Ultimately though, despite that rant, I'm glad I did it.