Talk to Dietitian/Nutritionist on What Tests Should I Get Before Starting Creatine, Protein & Multivitamins?

I’m 22, male, 66 kg, and regularly train at the gym. I’m doing well with my workouts, but sometimes I feel unusually exhausted during training. I also have anxiety, so I’d like to make sure everything is okay before starting supplements. I previously took creatine once and felt what seemed like a sudden increase in my blood pressure, which made me stop because I got worried. I’m now considering starting creatine, protein, and a multivitamin again. What blood/urine tests would you recommend beforehand to check my kidney/liver function, vitamins/minerals, thyroid, blood sugar, electrolytes, etc.? Also, what type of creatine and multivitamin would be safest/most appropriate for me once my reports are clear? I’d prefer to get a proper baseline first rather than randomly starting multiple supplements.