There can be many causes of this irregular bleeding. It can be due to implantation which is an earliest sign of pregnancy, hormonal imbalances, intake of birth control pills etc.The chances of conceiving before and after periods are less but not unlikely. You should wait for your periods. If they are delayed take up pregnancy test. If pregnancy test is negative you may need tests like hormonal assay, pelvic scan etc.Treatment will depend on the underlying cause. Hope it helps.
Best luck and regards!
Thank you very much! it helped a lot! thanks! :)