Don't worry, lots of us share information that most may consider to be TMI. But if it's a concern, it's better to ask than not to!
I've been on IP for 4 weeks, and my TOM started on time... sorta. I spotted for a week and a half, then TOM "officially" visited, lasted like, 3 days, and I'm still spotting through yesterday. It's been 2 and a half weeks!
You'll find all of us women's visits by TOM to be extremely irregular. I was scared at first but when I found out it's normal, I wasn't worried anymore.
