Strange discharge??

Ok hi so general info is I'm 18 and got diagnosed last December. Always had weird periods, got started on provera to have periods but haven't needed them for 4ish months. A week or so I got a possible cyst/infected node on my vaginal "folds" and now today I had a strange almost idk like spoilt milk smell to my discharge as well as pink-ish bleeding.

I am sexually active but we use condoms. Could have broken as they are a new kind we started using 2 days ago.

Sorry if this is weird but I don't have anyone in my personal life to ask about this as my mother who has PCOS past in Feb last year.

If more info is needed pls ask because I don't want to spend ages trying to see my GP is someone here may know.

Also from the UK.