Ruptured Ovarian Cyst?

I am 10weeks 3 days pregnant andI have been having sharp pains above my pelvic bone for a couple days now, and I woke up this morning and it hurt to even touch my belly. I went into the doctor today to check and see if I had a UTI and it came back fine. So I asked them if it could be my cyst on my ovary so they gave me an ultrasound . My cyst used to 7cm and she said was filled with 100cc of fluid and its down to 8 which is good. She said it looked like it was popping or rupturing and that was why my stomach was sore to touch b.c there was fluid in there. She said that if it is still hurting on Thursday to come back in. Well when I got home I looked it up and everywhere I looked it says when one ruptures you should be put on antibiotics to prevent infection. And now I am worried b/c they didn't give me anything and didn't even mention anything about infection!! Have any of you ever had a cyst rupture and they never gave you anything for it?