Need some insight!

Alright, so this was my first game where I created my own tactic based off of Mourinho's "negative" tactics. My first season was a success with Chelsea winning the title. Second season I don't know what's going on with my team, but at the moment i'm on a Drawing/Losing streak. I'm 3rd in the League right now, but I want some insight as to how I can get my team's form to improve!

Do I have to change tactics? Or do something else?

I'd suggest playing less defensively as the ai will have found the best way to counter your negative style now and switching things to a counter attacking or control style might throw the ai off balance and get you winning again.

Ah even as I try that my team is just dropping from 1st to 8th losing to West Ham, Blackburn and Man City. I don't know what's going on! I just can't seem to get a grip of the team I had last season!

Spend at least 50 million on a new striker.

Alright, so this was my first game where I created my own tactic based off of Mourinho's "negative" tactics. My first season was a success with Chelsea winning the title. Second season I don't know what's going on with my team, but at the moment i'm on a Drawing/Losing streak. I'm 3rd in the League right now, but I want some insight as to how I can get my team's form to improve!

Do I have to change tactics? Or do something else?

Put simply... not enough information.

Do you do press conferences? Do you comment/respond on/to other managers? Do you do the team-talks? Morale, form and fitness will no doubt have a factor, as will weather conditions, location (home or away), expectations, hype, etc... The more detailed info you give, the "easier" it is to 'advise' - although take note that even then there is no guarantee that what is suggested will actually work.