Anxiety attack + High blood pressure after baby

I was 11 weeks PP when I started to get heart palpitation, light-headedness, hot flashes and high blood pressure. My PCP diagnosed PPD and sent me to therapy. Turned out it's more of anxiety attack than PPD. 
I'm now 15 weeks PP and have been going to therapy sessions a couple of times and taking HBP medication. The therapy is helpful but I'm still having all those symptoms every now and then, because even the thought of having the anxiety attack itself makes me anxious.
Has anyone ever experienced such thing? And what did you do to overcome it? Really need help here.