The majority of engineering courses require A-level Physics and A-level Maths. If you find A-level Physics too difficult you will most likely consequently find an engineering degree too difficult, as it directly builds on and uses the content from A-level Physics and beyond in every module except the throwaway management modules.
If you aren't good at physics I would suggest considering a different degree and career than engineering.
Additionally electrical/electronic engineering is one of the engineering disciplines which has the most physics as similar to A-level, and otherwise. There's a reason it's the only engineering field routinely considered by physics masters courses for entry.
Also doing any degree with the aim of later doing medicine is a terrible idea as medicine for graduates is much more competitive than standard entry medicine for school leavers.
Essentially, none of your decisions make sense or even good, really and I would strongly recommend you go back to the drawing board and start thinking things through again - more carefully.