Side effects Brachytherapy ,weight gain, appetite,taste etc

Hi 1st time posting . I have recently had hysterectomy everything taken except lymph nodes ( grade 1b )and am now having 3 Brachytherapy treatments . I have had 2 just wondering if any body has had similar side effects ,pain in rectum mainly when defacating after first treatment lasted all day  ,some urinary mild symptoms after 2 nd treatment lasted 3 days approx ,mild symptoms of irritation like a mild uti, my stomach has got bigger I have put weight on fast after first treatment despite doing lots of walking somedays 10,000 steps .Don t know if I have an increased appetite because of treatment or if this has psychological causes , having these treatments makes me feel like a cancer patient ( they told me just op initially they thought 1 a) and I do not want to loose weight and look like one obviously see all those poor souls who are far worse off than me in waiting room , however I  am unhappy with the gain 5 lbs in a week and a half , I just want to stay the same although expect to put 5lbs on at Xmas !  . Have also had some nausea doesn’t last too long and funny taste in mouth effecting the taste of food sometimes . I must say after hysterectomy my bowel movements did not go back to normal having problems just no longer having  any push ,incomplete evacuation, won’t go into details .Surgeon just said take laxatives everything has moved into place where womb was , the laxatives don’t make a difference my stools are soft anyway . The radiologist at first brachytherapy to measure up scanned me and said I can see there is a lot going on you may need a barium enema to see what is going on before treatment begins the Dr may not want this so if you don’t hear anything just proceed as planned , they didn’t have time to do this I was on holiday the week before treatment started , 1 meant to discuss this last treatment but was thrown when it was thrown off kilter when it was a young lady I hadn’t seen before and not the usual older lady i had dealt with . I am feeling regretful generally unsure about this treatment especially as I have been given the dilators to use 3 times a week for a year . I am also waiting for results of scans treatment plan for a very rare cancer on the roof of my mouth which will need an operation so don’t see any end in sight . I drink very little and have never smoked so feeling resentful have 2 cancers at once would still be on non urgent waiting list if  hadn’t been for the Uterine diagnosis and demanded an urgent referral , don’t feel I will ever be the same again both physically and mentally both times Drs said it won’t be cancer ,HRT for 10 years is supposed to protect against uterine only had 1 patient in 20 years doesn’t look like cancer etc