Back on antidepressants due to anxiety and panic attacks

Hi everyone, I have been back on my antidepressants for just over 2 months (escitalopram 20mg) and I feel as if they are not working as well as they did before. I’m on the highest dose but still suffering with severe anxiety and panic attacks. For the past week I’ve been waking up every morning with bad anxiety (heart racing, constant worries in my head, nausea) and have been prescribed peryziacine* to help but scared to take them. Has anyone else experienced this?