New leopard gecko!! helppppp?

soo i jus bought a leopard gecko...nd he duznt seem to be eatin...hes a baby...nd i put 3 crickets in nd 1s missin but idk if he ate it...it mitev jus got lost in teh papertowel. its been a few hrs nd he hasnt went to the bathroom yet [im pretty sure] nd idk if he ate. he was housed on super fine sand BEFORE i got him, now hes on paper towel. im afraid hes unhappy cuz he keeps tryin to claimb out, evenm tho he cant...hes actin like the damn crickets. OHHH nd he keeps lickin his lips!! im nervous, nd hes not drinkin. i ordered calcium but im waitin for it to come in the mail, wat does all this mean? also, my mom has calcium pills w d3, should i crush tht up nd give him some in the meantime? and also, i noticed his house in the petshop they didnt have a lil thing of calcium for the geckos. OH nd 1 more thing! will it hurt the gecko if u stroke him?