I am a 34 year old male that weights 275 lbs at 6 foot 2 inches. I have been on Phentermine 37.5 mg for two months. I am also on 20 mg of Celexa. Could either of these medication create a burning sensation toward the end of ejaculation. I don't hurt it just feels uncomfortable. Kinda hurts down under the scotum, like inside my body. I have been sexually active with my wife only for 15 years. Can you help please?

Thanks You
Matthew