Can ur periods just change to lighter and shorter ????

So I'm usually 4 days as u can see around about Oct 18 until dec 18 I just got back home was heavily drinking and eating unhealthy and u can see it that time did effect my periods but since new year I have been eating healthy havent touched a drink and my period gotten lighter and shorter and now past two months I'm having little tissue bits pinkish and then small tiny dark red clot not alot like I said this is small small amounts 1 or 2 times during the 2 day period.

Is this normal. I also have had a bloated belly since Jan and hoping end of month wen I'm docs they can tell me the meaning of all this as I'm struggling to understand what's going on.