Is it normal for Invisalign to cause jaw pain while closing my open bite? (Photo)

I am only on day 6 of aligners set # 1. I have an open bite with an over jet of 4mm. I've had a lingering pain in my right TMJ for the past few days and I'm not sure if this is normal for treatment? I have had 4 teeth disced at .5 mm each and one of .4mm. Im not sure if I am just clenching more than usual and not noticing because of the trays in my mouth? My teeth do not close even more now due to added thickness of the trays. Any advice on normality of this would be great!