Bactrim Nasty Side Effects or Something Else/Help? hi all. hope you can help me. i'm a pretty healthy 17 year old female, i'm not sexually active and i don't suffer from any chronic conditions (diabetes, etc.). all the doctors say i'm really healthy. i DO however, suffer from anxiety and heart palpitations BECAUSE of my anxiety. but i have been feeling REALLY REALLY sick ever since i started taking this medication called Bactrim DS for a UTI. here's my story: about 2 days ago, i went to go see my doctor cause i had symptoms of a UTI (urinary tract infection), and at the time i was still sick from this nasty virus going around in my school, but i was feeling better. she prescribed bactrim DS (double strength) for me, but without telling me the acual results of the urinalysis, so i just took it. i figured, she's the doctor, she knows what's best. but the first night i took the medicine, i felt sick to my stomach within the next hour or two. i also have this extremely horrible, disgusting sick feeling, which i can't even describe. it's absolutely dreadful. i just feel so gross and nauseous all the time. i suspected it was my medicine, so i called the doc and told her, and she said to stop taking the medication. plus i found out then that i really didn't have a UTI in the first place. however, i did find out that they found something in the PAP smear i had about a month ago. nothing cancerous, just some inflammation. i have to get another one in the summer. my doc said i should feel better in a day or two, if not i should come back and see her. and i have just stopped taking Bactrim today, but i have 2 days worth of that stuff in my system. but i'm scared cause i never felt like this before, and it worries me. it's awful. has this ever happened to anyone else? feeling sick from Bactrim? i'm also worried that it might not be the medicine that's making me sick, but something else. i hope not. should i just give it some time to get better? can anyone help? any thoughs/advice is extremely helpful! <3 thank you so much! did you mean "clostridium difficile"?