Procardia XL 90 mg

Hi I have some questions. Hopefully someone can help. 6 months ago I started having high BP. Long storie short I was put on procardia xl. Started at 60mg then the Dr. rased it to 120 mg. Was working fine for about 2 months. Then I started having a racing heart high pules in the 100s. Went to the ER. And they droped my dose to 90mg. I noticed I have been getting a lot of heart burn. And gas in my chest after I take these pills. Mood swings High pulse. I have complained to the Drs. But they told me to keep taking it. It is really furstating causeing me a lot of anxiety because I never had these problems intill I started taking these pills. Does anyone know if that sounds like the side efects to procardia xl. By the way my BP is always around the 130 over 80 mark since I have been taking 90mg.