A 7 in chemistry should be fine. Equivalent to a B in a-level is what most uni's look for and you'd need a minimum of B equivalent at GCSE for that so 7 should be fine!
I got similar grades to you, hopefully we'll both get into medicine, I just wanted to see if anyone was in the same position as me
Some unis can be harder such as Sheffield who wants As and A*s, however what’s more important is that you passed your GCSEs, they want to know how you do with A levels
It depends where you want to study, not all universitys are that bothered about gcses most just want C-A* or the equivalent. But top universities want probably 7/8/9s. Remember though if you get hood grades now it will probably be easier at A level as its just expanding on what you already know and more