I am currently under treatment. İ bleed other than specific for women days. Any time I am under a stress I start bleeding. Now what are my responsibility for my prayers? Shall I take ghusl every time I bleed or do I really need to take qhusl in such the circumstances?

Please see the laws here for little, medium and excessive istihadha (irregular blood discharge):

https://www.sistani.org/english/book/48/2169/