oh, i hope i didn't come across to harsh.
. i doubt if the aloe did anything too bad, but if somebody was asking me what to do that's not one i would think to recommend. plenty of mamas give their little ones all sorts of stuff so i really wouldn't worry about 6 ml of aloe juice unless he starts showing some new symptoms. optimum intake IMO for infants is breastmilk, but there are plenty of mamas and drs who don't think a little formula or rice cereal in baby's bottle or other non-BM item is a good thing.
some mamas swear by gripe water, but i never tried it. maybe somebody with more gassy fussy baby experience can chime in. my dd1 used to have bad gas on the other end as an infant and we did the bicycling legs trick and the tummy massages and they seemed to help her.
the fussiness right after eating reminds me of things i've read about reflux so you might like to do some research about that. i've not had any experience with it so i'm not much help there. here's a link or two -- http://www.lalecheleague.org/FAQ/ger.htmlhttp://www.kellymom.com/babyconcerns/reflux.htmlhttp://www.askdrsears.com/html/10/t106000.asp