I am 25 weeks pregnant, at 21 weeks I had a UTI and my cervix measured short. At 22 weeks I went in to see the doctor because I was having contractions and my cervix measured short again 1.4 cm, I was given something against the contractions and something against vaginal infection. I went to my appointment last week and my cervix measured normal at 4.8 cm. My question is, do you think that the antibiotics I took for the UTI might have caused a vaginal infection that caused cervical shortening? (I had vaginal itch that felt like might be an infection) I am going away for the weekend and my doctor is on vacation this week he said that it was ok for me to go away, I feel fine. I have an appointment with him on Monday. Should I worry? I am still taking Nifedipine against contractions until Monday.