Im at day 25 of 28 of my cycle im havin these symptoms urinating more back pain on n off crampin last 2 wks pressure where the uterus would be tired?

Get checked: You should see your doctor and get checked for a urinary tract infection and make sure you are not pregnant.

Get a pregnancy test: You could have developed a Urinary tract infection. There is always a chance that you may have conceived as well - if this is the case then there is a risk of an ectopic pregnancy as well. You need to get a pregnancy test and see a doctor if your pain increases. If you have a UTI, then you would need antibiotics

Possible UTI: The uterus is right behind the bladder and hence this could be an urinary tract infection