i am so confused, because i get periods for one or two days, so i wana know if this is abnormal or is it f9 for my future life?

i m 18 now, i think i was 12 when i start to get periods. so ever since i start to get periods, i never get them for more than two & half days, but these days i just get them for one or one& half day.... so i m worried if this will be any problem for me in my future life....like after marriage life or during menopause or in my adulthood too... so i m confused that if this thing is normal or is it any problem and should i ge any treatment? i m so confused... plzz helpp mee.....

i will be looking forward for answer....