My Ex GF Reappeared Then Disappeared?

Two months ago my ex GF contacted me after two years of no contact-when I was with her it was a very complex different relationship then most people have in the sense- we never met anywhere except at her house and only spent time there which is why it ended-I know some might ask was she married or with someone- I knwo for a fact she was neither-fast forward two years later she contacts me via call my cell phone asking to meet- we meet for a coffee then go to her place for a while-nothing happened between us- she went on how she was glad we were on speaking terms again and wanted to meet again-I said Id agree to meet again-when I didn,t hear from her after one week- I rang her to my surpise her phone is turned off ever since-I called to her place once during the day I got no answer-all the curtains were pulled across-Im left wondering and asking why would she rant on shes glad Im talking to her again then have her phone turned off-Im at a loss wondering about it- and the funny part is Id completely forgotten about her until she contacted me- whats your thoughts on the situation- what would you do?