Tightness in forehead after Botox. When do you think this problem will settle?

Hello , I had 20 units injected in my forehead and at 11 , since 2 weeks back . I felt heaviness which improved . I also had moderate tightness since that time which is becoming less by time ... But it comes in bouts when I can realy sense that one group of muscle is tight compared to others... And sometimes I feel that I am raising my eyebrows without intention and this will aggrevate the pressure ... I feel anxious because of that . When do you think this problem will settle ? Thank you