I been stressing feeling sick when i eat in my upper stomach cause my period is late & i have no signs of one. i haven't had a penis inside me?

Ok: First, start with some zantac, (ranitidine) you likely have reflux. The anxiety may cause a change in the cycle, then ur on a feedback loop. If ur not sleeping well, have low body weight and a poor appetite due to stress, consider a drug called mirtazapine. It helps all of those conditions but takes a while. Periods can be off for a number of reasons but you may have an anxiety problem. First comesinsomnia.