Seeing blood on one's clothing after performing salaah

Q:

1. After I had passed stool, there was a lot of bleeding in my back part. I wiped until I saw no blood on the tissue, then took a shower, then prayed dhuhr and asr prayers. Then at maghrib I went to the bathroom, and saw even more blood. Do I assume that the bleeding started again after I prayed asr, or do I assume that the bleeding was going on the entire time and therefore I have impurity all over me (because I showered) and my prayers are invalid?

2. Also, I often have bleeding in my back part and the toilet tissue we use is not clear white - it naturally has yellow/brown/red bits in it (I think it is because the tissue is recycled) and this makes it hard to tell if something is blood/stool or just the normal color of the toilet paper. If I wipe until the toilet paper comes back clean, then wash myself, then check again using toilet paper, however during the check I notice some spots that I'm not sure is normal color vs blood/stool, so I check again, but this time the toilet paper is clean, can I assume I am pure?

Performing qadha salaah

Q: I started praying five times a day. Now I realize that I lost almost 25 years of praying. So according to this I was praying all this month but not regularly so Ramadan regularly praying almost praying for other days as well morning. Was it as well so I feel almost 10 years has been done now remaining 15 years prayers out there so I calculated for 15 years. So I need to clear 5475 pending prayers it is just an approximately figure please suggest advise me on this one

Trust in Allah Ta'ala

Q: I am an engineer and jobless for 2 years since my graduation. I have given so many interviews and tests for job but had no luck. Now mostly I am in deep depression and I also don't have my mother as she is no more to whom I could share my feelings. I blame Allah for my destroyed life and I pray to Allah to give me death. I heard a Hadith about Allah loves the human beings 70 times a mother, which I truly & strongly believe is LIE or atleast in my case..!! Thats it, I don't want your opinion to trust in Allah, believe in Allah, something good will happen etc etc. Have a nice day.