Ejactulation symptoms and conditions

im 25y/o pretty athletic guy (always exercising and lifting weights) but turned out to have slightly high blood pressure (doc said prolly from drinking energy drinks every day for 7 years) anyways i was prescribed 12.5mg tablets of lisinopril and my first side effects were deep beating heart.. like I can feel it at times just out of no where.. light headedness at times, stomach cramping and most importantly I got retograde ejactulation (which means sperm goes into bladder instead of out through penis). Im also not interested in sexual activity anymore... Its horrible to think I might have to take this medicine for ever.. I dont know im thinking maybee not takin it would give me a better way of life than living with these side effects.. Im not even myself anymore, im all calm, slowed reflexes.. People are joking around and im like drugged up just listening not really joining into conversations... this is stupid that this medicine aimed to help us seems to actually hurt us as well.. I cut my pills in half with a pill cutter in hopes maybee the lower dosage will net me less side effects and still healthy BP.. we will see..