Eviction Question in Illinois

[Gina Broom]

My tenant has been a nightmare! Every excuse in the book on why she can't make rent. Finally gets caught up but the lease is coming to end June 30th. Obviously i'm not renewing and now she's mad. For May she still owe's $200 plus all of June's rent $1,200 which total's $1,400. She's pretty much said she's not paying it because i have her security deposit which is $1,200.  

My question is, Do i issue the 5 Day Notice to Pay Rent or just ride out the month? 

My husband drove past the house to see what activity is going on. She rented a dumpster to start cleaning up the property. We think she's going to leave at the end of the month but not 100% sure. 

I'm scared to issue the notice and scared not to! 

All advice welcome! Thank you!