If you can afford it, a negative ramp followed by short breaks might help. For example, you play $5 at TC -3, $10 at TC-2, $15 at TC-1, $20 at TC0, $25 at TC+1, $75 at TC+2, $100 at TC +3, and $150 at all higher counts.

Otherwise, first time below TC-2, stand by your spot and text. Use an act for another phone break. Bathroom break if negative TC persists, return at end of shoe. Leave only if plenty of other tables available.

Ensure you are not being paranoid, usually at red chip 8 deck tables, no one cares and interest only goes up if you are placing $50+ bets and have a huge pile of chips.