Aqua sun Pisces moon disappears

My LDR bf who has aqua sun, pisces moon and venus is disappearing for almost a week now.
We didn't fight or argue at all. He supposed to have the defense on his thesis last Friday.
I texted him on Thursday's night, wishing him good luck on his thesis... NO RESPONSE even now.
It's been 5 days already that he hasn't texted me and neither do I.
I'm trying to give him space and time. But Idk if he's already done his thesis or not.
I told him to keep me updated, but of course, he hasn't told me anything.

What should I do? Should I text him, asking how is he OR wait until he contacts me?
I'm just worried that he might get sick or want me to be there for him.

P.S. He disappeared on me once for a whole week... and he came back like nothing happened.

Rule of thumb....people that care about you DON'T disappear on you.