Hi just wondering if you could help my periods have been weird for past 5 months and I am starting to get worried about them

What exactly are you experiencing?

I have irregular periods and un unusual bleeding

As in your periods are no longer coming according to your usual schedule? And you're having breakthrough bleeding?

For past 5 months I have been having periods from 34-37 days and I used to go every 28 days exactly and when I do have my period its weird bleeding

There are many, many things that can effect a woman's period.
Have you started dieting, are you stressed, have you begun working out or stopped working out? All of these things can have an effect on your period.
If you are really concerned, you should go and see your Dr.