Has any1 been sick durin the evenin around the same time of the day?

i hav came off my pill last oct and then i came on my period in march but now i havnt been on my period in april and these last few days i hav been sick durin 6-7 spec wen i eat somthing.. if i am preg how many weeks or days till you be sick because this is drivin me mad.. it was weird wen i took a swig of vodka the other night and my body just rejected it and last night i tried drinkin but was to tired and ill.. has any1 had the same thing?