Okay soo ive been staying home lately?

Soo my hairr can grow and hopfully get thickker. cuz i dont go anywhere without straightening my hairr. anyways. i want my hair to look thicker and longerr. ive put castor oil ive deep condtioned it iver hot oil treated my hair. ive tried my hardest to get it too thicken i take multi vitamins. and nothing. its been 6 months and it hasnt grown i trim my ends and eat helathy