About anxiety. Neck n howtodealwith!

Hi recently I became mother of 3 1/2 months baby boy through ivf after 9 years of marriage. I am doing fine but my mental health (u can call overthinking,anxiety,stress, panic) is the problem. It's with me from beginning I think n in lockdown it's burst out. Then also I managed it with spiritually but it's tr still.im very happy in my personal life but this anxiety became habit (pattern) in my daily life.my mind goes tr only panic for small small things like taking bath, cooking n look after my baby. Always running n panicking n gone through symptoms like faster heartbeat, severe headache,etc. that time i ll chant my fav hanuman chalisa,meditation n al. At that time I don't know my mind goes deeper like i am going somewhere n something happens to me.my head weight,back neck nerves become more painful n eyes ll become weak may b blurry but i can read small letters too( don't know how to tell) n feel like i ll fall.this destroys me fully pls tell me exercise for head,neck n howtodealwith