What Causes White Spots Along With Light Blotches On Skin?

hi! About 2 months ago i noticed a white patch on my side on my pantie line and a brownish redish patche on both my upper thighs! Then i started using a sunblock on my face and arms! It said i was oily..but i was and i already sweat like crazy..and this made me sweat even more! Think i had a skin fungus..been treating it everyday with tea tree oil body wash..i got some white spots and light blotches on my skin..even my legs..pretty much everywhere! I need help can t go to the doctor cuz i don t got insurance! And im getting married in 3 weeks! Please help me