2 months ago I got  my period in the beginning of the month and I got one at the end of the month. Then last month I didn't get my period at all so I took a pregnancy test it came out negative. Then this month I thought I got my period but it wasn't like normal. It was a little bit of blood. Then it stopped flowing out and I only saw blood when I wiped myself. It's started to faint away but now it came back. I'm scared and idk what it is. Please help and thank you!