I smoked marijuana for 2 days straight before I went to jail. I was in jail for 28 days and I have been out for a week now. If I took a drug test tomorrow would thc still be in my system?

It could depend on your previous history of cannabis use, not just the 2 days previous. In most cases at 35 days the system would be clear of THC and other cannabinoids, but THC is an elusive molecule and is very unpredictable on an individual basis after sustained use.