Advice on possible crash? Newly on Prozinc

Good evening. I also posted this on the prozinc thread. This is Mango's third cycle of 3 units of Prozinc up from 2.75. He was in the black for his AMPS. I've tested through out the day today and just tested 3+ PMPS. He is going low. He went low last night and I had injured my foot and felt asleep and didn't test after +5. Seems that he goes his lowest at +9. Should I stay up and keep testing until 2 am? I will do whatever it takes to not see him in trouble. As you all know it's a challenge to find the correct dosage. I have no idea if he crashed last night as he seemed chipper and perfectly find at 5 am our test time. Please assure me if I am on the right path or not. Advice is appreciated.