I felt like one of those overly worried pregnant women in the movies!!

Well this week has been an interesting one to say the least.
I should start this by saying that I Monday night on my way home from work I mentioned to my mom on the phone that I had just had two Braxton Hicks contractions in a row. Not normal for me, atleast not lately. I sort of ignored this and went on with my night. By about 7:15 I really noticed that I was still having them, but even more often instead of one every two hours or so I was having one every 10-20 minutes.
No pain as you know if you've had them yourself it was just the tightening of my uterus. But it wasn't even always the entire uterus. Sometimes it was the whole bottom half, sometimes the whole top half.
Needless to say from 7:30-8:50ish they became more frequent and by about 9:15 I was starting to get worried because I was having this happen almost every 3-5 minutes for 30 second intervals. I called my mom and good friend to ask what to do?? Mom tells me to drink water which I did because she said that it could just be dehydration. I drank a whole bottle of water and then called my doc.
This was about 9:30. The doctor on call called me back and asked a bunch of questions. I assured him I felt just fine, completely normal actually aside from the constant tightening. I didn't want to blow it out of proportion. He asked more questions about how often and exactly what it felt like. He then says "I'm sure its nothing, It could be that your very dehydrated, it could be nothing. I would take it easy and drink a little bit more water and see if that helps and if it doesn't than I want you to head up to labor and delivery at the hospital". So I say to him "So drink some water, wait for how long before I head to the hospital?" He was like "well I think you should get ready to go right now and drink the water and just go ahead and head up there now". I was like "WHAT" what the heck happened to drink some water and see if it helps???
Needless to say we went to the hospital, were there for 3 to 3-1/2 hours and they were just about to let us go because the bh's had slowed down to nearly nothing. I was hardly having them. Must have been the water that helped. They said the baby was fine. They decide to take a urine sample just in case right before we leave. One hour later they come back to tell me I have a UTI. Great. That's lovely. I know its really common in pregnancy but I was like "how did I get that"? The nurse assured me its common but we were confused because I was having no symptoms aside from the bh's. Which they said were happening because of the infection. They sent me home and gave me meds. I'm so glad everything is fine with the baby. The bad thing is had they not caught it, the infection if left too long they said could force you into early labor, so I'm very glad that didn't happen.
Also Its weird I didn't have any symptoms, then yesterday and today I'm misserable. I'm on antibiotics so I just hope it goes away quickly. It hurts in my lower stomach now, I'm going to the bathroom every 20 minutes and nothing comes out but it feels like I need to go so bad and it burns. I just think its strange this just started happening. Sorry if that was tmi!
Today I was worried because I keep thinking the meds will clear this up. But still no change, it seems to be getting worse.
Have any of you ever had one of these while pregnant?