Menstrual circle

Yellowish Discharge & Woman’s Period

Assalamoalaikum, My period is normally 9 days long but sometimes very rarely it may be 8 days and even more rare than that 11 days,11 days has happened to me only in the last 2 ramadans.This year in june and july my period lasted for 8 days, then in august for 9 days . Now the problem is that of september. I think i saw clear discharge on the night of 8 day, and did ghusl and prayed but the next day in the morning i saw yellow-brown discharge. I took it to be waswaas, as i am effected by that alot, and prayed anyway, taking this discharge as istihaadah. However just before ramadan i did ghusl again to be on the safe side, all the while taking this to be waswaas. I think ramadan was three days after this. Then when i had menses in ramadan again, at the end of this month when i saw discharge again i thought i had made a mistake in deciding purity the previous month. So tell me what should i do? (1) Should i repeat the prayers for three days, because i did do ghusl before ramadan started to be on the safe side. And i dont really remember if it was a day before ramadan , i am taking it maximum to be three days before i did ghusl again? (2) OR should i take it as istihaadah because i think i did see a clear discharge and stop worrying about it? what if i see clear discharge on the 8th day and then again brown on 9th day,should i do ghusl again, beacuse normal period is 9 but rarely it may be 8 days. (3) OR since i am having doubts as to whether discharge was properly clear or not on 8th day, i should just offer the 15 prayers? If this is the case should i offer them in one session or one with every present prayer according to convenience? Please provide me with a proper fatwa, i am really worried about this and it has been too long now,i dont want to delay it any further. Jazak Allahu Khairan.