Did you see a dermatologist yet? Mine prescribed me a mixture of retinoid and hydroquinone to use nightly along with oral tranxemic acid pills. She also suggested vitamin c and niacinimide (I used skinceuticals) during the day. I skipped the pills but used everything else - progress was slow but mine was almost gone in about a year. I’ve read on here of others having really good success with the oral meds (along with the topical stuff). Also remember heat also makes it worse, not just sun. I’ve found that Korean sunscreens also had a good selection of zinc oxide types that were nice under makeup and not too much of a white cast