I’ve had them for the last two weeks and feel they’ve steadily got worse. Last night they felt so heavy in my chest. I also get them when I’m tired so I take myself off to bed and by the morning they’ve gone, but can come back during the day. There’s no pain I’m experiencing just heavy palpitations and I’m worried about it. I’ve been taking sertraline for the past two years so doubt it’s my medication. Any advice welcome, thanks