Super light period??

So my period skipped for about 2 months and just recently came back last month. However, when it came back, there was a little blood when I wiped on the first day I found out it came on. Then throughout the week, there was no blood. I assumed it was just a weird month and went on with my life. I just got my period for this month yesterday and noticed light pink blood when I wiped again and no blood throughout the day. What could be the cause of this? All my periods are heavy the first 3 days and lighter the rest of the week so I’m very confused.