<s>[INST] Hi I m 35 years old and 7 weeks pregnant. I recently was diagnosed with a uti and was prescribed amoxicillin. On this third day taking the antibiotics I m experiencing very bad backaches. I don t know is this is normal for pregnancy or something more serious due to the antibiotics? I m not spotting or cramping. But the backache is starting to get really uncomfortable. [/INST] Hello dear, I understand your concern. In my opinion the backache might not be amoxicillin. The backache might be due to various reasons like:-1)Muscular pain 2)Renal stones leading to urinary tract infection(UTI)3)Back pain associated with abdominal cramps with spotting might suggest miscarriage. As you have a history of UTI I suggest you to rule out renal stones by getting done ultrasound. If the ultrasound shows normal study without any renal stones then the back pain can be attributed to muscular pain. And some or the other types of non-specific pains are commonly seen during pregnancy which subside spontaneously after delivery. As per your information the symptoms doesn't suggest miscarriage. So relax. Nothing to worry. Take adequate fluids up to 3 liters per day and cranberry juice to prevent UTI. Take rest. Avoid physical strain and intercourse. It will subside. Hope this helps. Best regards.... </s>