my last menstrual was in February but it wasn't heavy

Usually not, you shouldn't go like 2 months without a period, i have Polycystic Ovary Syndrome and i went from irregular to zero periods so it's definitely not normal, wait a couple more months to see if it comes back incase it's an off few months because of maybe stress, if it doesn't come then you should maybe get tested for PCOS.

And yesterday i got my period but my period its not heavy. And last year my period is not coming for 4months

Definitely sounds like PCOS symptoms, typically a period should come every 28 days, doesn't matter what time of the day just that it should come on the 28th day, sometimes off months can happen but it's not normal for them to take months to come, this is how it become for me at one point except worse, for a little while for 2 years id go 4 months from spring through summer without a period and other times id get my period any where from 1 month, 3 days to almost 3 months the finally my periods just suddely stopped because of my PCOS, need to go get blood tests myself but i defiitely know i've got too much testostrone from the excessive hair all over that i get, definitely worth getting check ups.