Irritants symptoms and conditions

I started taking Lisinopril for high blood pressure and 3 weeks after developed urinary tract symptoms (frequency, pressure, some discomfort, itching). The first time I went to the gynecologist to leave a urine sample, they prescribed me antibiotics, which I took for 7 days and still the symptoms continued (my urine had tested negative), so I went back and gave them another urine sample, it tested negative again, but had blood in it. They gave me a higher dose antibiotic for 3 days, the symptoms were still there. After that, there was nothing they could do, so they sent me to a Urologist.
By the time I got in to see the Urologist, a month and a half had gone by and I decide to quit taking the Lisinopril to clear my body of anything. I ended up getting a kidney scan, which was normal... and then a urinary tract scope procedure, which was normal.
After these procedures, I noticed that I started getting better and thought I might have just had "Acute urethral syndrome (also called noninfectious cystitis) causes symptoms that are similar to those of a bladder infection but that continue for longer periods. It is not an infection. No bacteria or other microorganisms are in the urine. The cause of acute urethral syndrome is difficult to determine. Possible causes include injury or irritation, allergies, stress, a disorder of the nerves, or problems with the immune system. You may be able to relieve symptoms of acute urethral syndrome by avoiding bubble baths and other irritants and not drinking citrus juices and caffeinated fluids."
So, I went back on Lisinopril, which was a few weeks after I quit taking it. After only 3 days, I started getting the frequency, discomfort and some itching... I could only figure out that Lisinopril had everything to do with my symptoms. This is still to be determined, but I feel like my urinary tract is feeling better every day now.

I've had Mirena for 5 months now. I bled for the first 3 months ... straight ... but months 4 and 5 I've had regular periods (which I'm hoping disappear altogether as they did with BC Pills for me). Anyway, I'm trying to weigh the pro's and con's. I'm 33 and don't want kids, so I think this is a great alternative to other BC's with the 5 year safety, however, I have seriously been CRAZY tired and lacking energy for the full 5 months and am so bloated I look pregnant (when I normally have a flat, attractive tummy). I've never experienced anything like this. I'm not ready to remove it for these irritants - yet - because I truly feel it's a fantastic concept. Was anyone able to combat these things? I'm not about to get on diuretics because that's a temporary and unhealthy habit. I drink plenty of water, work out (when I can find the energy) and eat very healthily. Any advice that's worked for others is welcome!