There is no way of knowing when it is going to come (for you) unless you start taking the contraceptive pill. That will force your body through a cycle.
Exercise will help your period come naturally. It helps your body produce all the hormones and chemicals that need to build before your period will come.
Each individual is different. I also had a ruptured eptopic pregnancy. They had to take my left fallopian tube, but my cycle started normally about the next month or two. I've heard that if there is problems starting, then you should consult a doctor about ovulation pills.
I two had an eptopic around the same time and like dainna my periods came back the next month and were normal since.
I am now 15 weeks pregnant and all going well ;-)
I would see your doctor or surgen - contact you gyene ward they should be able to point you in right direction.
Hope everything works out well for you - eptopic isnt the end of the world (i thought it was at one point) x
I agree, sounds like you may need some BC or soomething to get you back on track.
I am so sorry about your loss and wish you the best of luck!