My period used to skip 2-3 months and when I got my period it only lasted 3 days but now it comes every months and lasts almost 2 weeks. Should I be worried ? And random pimples are popping up on my body.

It really depends on your age. If you're younger and have only had your period a couple of years then all of those symptoms are totally normal because you're body is just adjusting to being a woman. If you're in you're early 40's to middle 50's it's most definitely signs of menapause. Any age in between it could be a # of things. You might be pregnant( your period doesn't always stop when you're pregnant), or if you just switched to a new birth control or an IUD that's normal.

Cycles are different and will change with age, health and other issues. Are you having regular checks with you doctor ?