I am 25 years old and have two kids. I have never in my life had a regular period. I think that some of us are just unlucky. I wouldnt worry about it, I have some of the same problems with my periods. Also, sometimes your periods can be irregular do to stress. Im sure its nothing to worry about.
Im 18 years old and have a question about my period. I get my period lasts for 9 days and it will come like every 25-30 days. My period is usually normal for a while and then will go irregular for like a month or two. When it is irregular i will get it like every 2 weeks for awhile and then it will go normal again. Recently i had my period and when it ended i got it again 11 days later. After that cycle ended i got it again (today), it has been 15 days since the last one. I was wondering if this random irregularity is just becuase of stress at that time.
I don't know about the bumps - sounds more like a dermatology thing than a hormonal thing. It's hard to say though without knowing more.
As for your period, you need to make an appointment with your doctor. He will give you a pg test to make sure you are not pg, and then he will give you Provera to make you have a period. At the appt. you can ask him about going on some type of birth control - this will regulate your periods for you. Lot of people have gone through, or are going through this. It's not a big deal - your doc will help.
Good luck!