I have been using minoxidil lotion on my scalp prescribed by a hair loss clinic I’m now very worried that I’m going to have a heart attack?

I have been using minoxidil lotion on my scalp to increase hair growth (plus laser therapy and saw palmetto tablets) all as prescribed by a hair loss clinic. I have been doing this since January 2017 . I have noticed slight palpitations and googled a possible connection with Minoxidil. I found that it can give you palpitations and even chest pains. I also suffer somewhat from health anxiety and can’t easily separate fear from genuine physical symptoms. I’m now very worried that I’m going to have a heart attack. If I stop the Minoxidil, all gains will have been lost and I’d have thrown away £900…

I would like to have reassurance that I’m unlikely to damage my heart.