You need antibiotics if you've got it properly. If it's very early you should try flushing out with lots of water. Cranberry juice is only good for prevention, it's actually not good once you have it. I've had kidney issues for the last 15 years so I do know what I'm talking about. I had to take antibiotics for most of my third trimester as the uti's just wouldn't shift. I've heard bicarbonate of soda mixed with water as a drink can help a bit. I'd ring out of hours if I were you.
Yeah, I've had urinary tract problems all my life but since being pregnant haven't had one problem... My test sticks at home do not show anything other than the slightest increase in protein (which again can be normal for me) but I have the "need to constantly pee but it's only a dribble" and burning after urination symptoms which tends to mean something is brewing.
I used to just take sachets at this stage, powder you add to water to dilute your urine and flush you out but I can't remember the name of them!
Quite honestly I’d be seeing the doctor for cystitis even if I wasn’t pregnant but you definitely need to get it seen to. I had a horrible bout of cystitis when I was younger that made me so ill I passed out on the bus on the way home from uni.
I had a symptomless UTI at about 20 weeks pregnant that was only picked up during a routine urine test at the midwives. I went to the dr and he said there are specific antibiotics that are safe to take at various stages of pregnancy so you really need proper medical advice.