Just seeking some answers

Hey guys i know iam always trying to find out whats going on with my body and asking so many of these questions but iam just hoping if you experienced the same thing you can relate to me and i wouldent worry so much about certain things. I was wondering if anyone out there ever had a fast heart rate post mirena and it seems to be elevated when it shouldent be like when your just laying down or after you wake up or sitting down, i think if my heart rate wouldent be racing the way it does all the time that i would feel alot better. Sometimes i feel too out of breath to talk, and last night my right arm felt heavy and somewhat tingling and that was a new feeling. Open to any suggestions here.