Hi guys! Thanks for the replies.
After spending over 15 hours in the bath the day before, and 4 hours last night, I rang the 111 NHS service. They got me an appointment with the hospital and the urine sample came back with blood and lots of something else, so it was an infection.
I don't know why the doctors failed to detect bacteria twice with dipstick tests and once with a dipstick test and further lab tests, but they did. So relieved I could cry, as I have a midwife appointment tomorrow and was scared that I wouldn't make it.
I do suffer with constipation and find that I go less now that I'm pregnant. When I urinate, this too seems to take longer to process through my body. I noticed this at scans when my bladder was full, and when I initially emptied it, not that much would come out. I'm guessing it may be a pregnancy related thing.
I'm worried about taking the medication, as the doctor said that he usually wouldn't prescribe this type of medication again so soon. However, to be out of pain and finally get a good nights sleep will be a blessing!
I'm hoping that if I contact the doctors Monday, they'll let me have some sort of prevention scheme where I can take one daily. I do believe this will be a common occurrence.
The doctor at the hospital also recommended that I have a scan on my kidneys at some point soon, due to the amount of - forgotten what it's called - but something that was detected!