Gsce tips in last three months + opinion on future plan

I’m in GCSEs right now and I’m taking maths foundation (edexcel) combined science trilogy foundation (aqa) English lit (eduqas) English lang (aqa) geography (aqa) religious studies (edxcel) business studies (aqa) and Spanish foundation (edexcel) anyway my point was it’s now basically 3 months till GCSEs and I’m planning for these grades 5 in English lit English lang 9 geography 5 religious studies 7 business studies 4 (I hate sm 😭) and Spanish a 5 and science 4/4 and maths 4 but my mocks were no way near what I wanted I as in the year 11 mocks they were at least a grade up from 1 or 2 from my very failing grades in year 10 but issues anyway at home were too so that’s excused but I’m kind of stressed as in I’m thinking of just doing past papers predicted papers etc as I think the notes are. Now useless what I got for English lang was a 5 which expecting a 6/7 but I just feel like at least in all the grades I want that 9 but idk if that’s ever possible I feel as a person with very unrealistic dreams I feel like I plan the most detailed undrelastic things that makes me feel anxious plus the fact that sleeping till 12 I’m learning so much content which is very stressing it’s the fact then for a levels I want to do English lang media studies and sociology as I’m thinking of going first to international relations and do a degree apprenticeship and join the United Nations but then recently I’ve been going on the very useful website that the school gave that helps for careeers etc and because one of the quizzes gave most of a percantege of socially interactive one of the other career options were public relations which I know are complete two different things yet I can understand where it’s coming but from the roots of these jobs is getting a degree and do my job for like one or two years and truly from the bottom my heart do content creating which is enough to buy my house and move out from the uk- the whole point is from all of this I wanted to whose wiser who has advice on my whole base thing and may give opinions on this lengthy but again pls give advice one this whole overall thing