When does nausea from birth control pills go away? on second month, a few days in taking antibiotics for uti can that be making it worse?

Very unlikely: The antibiotics are not a probable cause for prolonging your reaction to bcps (if that is what it is). If the nausea was due to the bcps it will probably disappear in a month or so. If, however, you are having thoughts of suicide you need to go asap to a psychiatrist and have this assessed before you do something which will be regretted. Go now. Do not wait. Best wishes.