Anxiety when driving

Hi all. I’ve been struggling with this for about a year now. I am not worried about getting hit. I just feel so pressured when people drive behind me especially when they tailgate me. I just can’t shake the anxious feeling of being rushed. It is even worse when on a single lane road and I feel like I’m holding people up even when I’m going at or above the speed limit, sometime I have to slow down because I’m going around a curve or slowing down to make a turn and I feel like I’m holding people up. I usually stay in the middle or right lane. I was on medication for this and nothing has helped. Please if I can have some tips for this I would really appreciate it thank you for your time.