PCOS? HELP !!

hey girls! im 19 & since around the time i started my period (12) ive always had a few problems inc excessive sweating, really bad mood swings, always always being tired & breakouts, my periods have always been semi irregular they never come on time but theyre never far off their expected date but my period itself is always very long & heavy (about 6-10 days) & my cycle is about 21 days, but i was on antidepressants at the time and my dr said that was happening because of my medication, when i was 15 i got the implant as birth controll but that made me bleed for 3 months straight so i went back to the nurse and she told me it could stay like that until 6 months then itll go away so i tried that, 7 months later i got it removed. i stopped taking my antidepressents about 2 years ago (purely because thats what i thought was causing my symptoms) recently my sweating had gotten really really bad along with other symptoms so i went to the drs to see about a thyriod problem which is what i thought it was, got my bloods taken & he said based on my hormone levels he thinks its pcos but my internal scan isnt for another week & im going out of my mind worrying! i get stressed really easily and this not knowing is not good foe me! me & my boyfriend have been trying for a baby the past 2 months with no sucess, have sex one or more times a day around the time im ovulating (according to the app) im really petite eat pretty healthy dont exercise as much as i should but i am on my feet all day at work (promise to start exercising) can someone please help me understand whats happening or let ke know their story, having kids is all i want & it feels unlikely at the moment 😞