Hello Kim and welcome.
The irregularity of your menstrual cycle and intermensteual bleeding is due to either the very condition (i.e. PCOS
) or a side effect of the birth control you are on. So it would be considered normal, but would still be best if you can drop by your doctors just to make sure all is well.
As for your sexual life, this is nothing but mild vaginal bleeding and if you wish, you could still continue with sexual activity using added protection like condoms.
Hope this helps.