Well there is some evidence, in one case, a man reported taking 6-8 grams/day of creatine for about a year with no problems other than occasional diarrhea. He stopped working out and taking creatine for about 6 months while recovering from rotator cuff surgery. When he returned to his previous workout-creatine regimen, he experienced anxiety attacks.
You need to be concerned about dehydration when taking creatine.
I read a few years ago about someone that had anxiety and heart palpitations sleep apnea, and insomnia.
Creatine theoretically helps build muscle, but it shouldn't be causing speeding. But there are probably other things in what you're taking that do. I'd just skip the supplements and work out. If you're workout is heavy on resistance training, then protein is what you need. If it's heavy on cardio, then you might try energizing foods such as spirulina or bee pollen. Adaptogens such as eleuthero and rhodiola will do more for you than bodybuilding supplements, which are full of things that are bad for you and might be full of things that aren't even listed on the label, especially if you're shopping at a place like GNC or over the internet. Are you trying to get really big?