Salaah

Not feeling the connection when making dua at the time of tahajjud

Q: Tonight I got up to pray tahajjud and when I started praying it felt like a tahajjud prayer though when I went into Sajda, I didn't feel the connection I thought I would, like I went to Allah in taha while crying and when I started praying all my tears were gone, I wasn't able to cry in my sujood. Does this mean I didn't pray it right?

As I checked that I did my wudu right and covered up my self right though still I feel something was missing.

Adding to that, I'm one day away from my periods and I also thought that the crying part was just from my mood swings which are a symptom of our period coming, because when I stood on the prayer mat all the tears went away.

Moreover, I had weird thoughts during the prayer like I wasn't praying right and had alot of skulls appearing in my thoughts (jinn like thoughts). Please share if there is a problem in this or am I just overthinking?

Giving kaffaarah for missed salaahs

Q: I would like to know if there is a way I could pay for the missed salahs in my case.

After giving birth my menses cycle did not go normal and was bleeding continuously due to feeding. An Aalimah told me I needed to refer back to my habit previous of pregnancy which was 23 days of tuhr and 5 days of haidh. In this way while doing the calculations almost 2 years later I have discovered I have missed about 400 salah.

With 2 children it may become difficult to perform qadha. Is there a way I could pay for this miscalculation or does Qadha have to be performed?