Hi, I Am 18 Years Old And Have Been Going

Hi, I am 18 years old and have been going through a lot of stress, depression and anxiety for the past 2 years and have gaine weight. I get my periods regularly each month. But, last month my period came twice. The first time it was red but very little and lasted I think one day the second time it was light and the colour was a very little red sort of like water colour on a paper smudged with water. And it lasted 2 days. This month I got it and it was light and red like last month and again its the third day and the blood is brown and light. I don't know what's wrong, can you help me?