I was ready to do a hefsek on April 8 but failed to do so due to sitting shiva I further did not do any bedikas but I did wear white panties
Now I want to go to Mikva what is my obligation to be able to go.
Hamakom yenachem eschem b’toch shar aveilei tzion v’Yerushalayim.
In order to start the process of tahara there must be a hefsek tahara, meaning that you have to have done an actual bedika, therefore in order to go to the mikva you have to do a hefsek tahara and then the regular bedikos, and then you can go.
Times are difficult now, and when we keep the mitzvos, even though it is very difficult it is a tremendous zechus for yourself, you family and all of Klal Yisroel. Additionally it is a big zechus that you should have children that will have a neshoma tehora, and grow up to be a yiras shomayim and a talmidei chachamim.
May H-shem comfort you together with all of Klal Yisroel in these difficult times, and the zechus of your mitzvos together with everyone’s tefillos should bring a yeshua to Klal Yisroel.