I wanted to see my previous submissions but I cant seem to find the login page. What to do?

You can see your latest submissions here: http://acm.timus.ru/status.aspx?author=191109
The "kinda" login page is http://acm.timus.ru/authedit.aspx but you only need that if you want to fix some of your info. By submitting a solution with your ID, you're already "logged in", but it can only be seen through the list of your solved tasks.

In the link you mentioned for last submissions, I can only see last two of my submissions but I remember solving other problems too, which I cant see.

This is because you have registered two accounts: http://acm.timus.ru/search.aspx?Str=+Yogendra+Singh+Chouhan
If you want to see latest submissions from your other account, change 191109 to 191110 in the link above.