Headaches & neck pain

Hi, since July 2024 I have had tension headaches mostly in the back and the top of my head almost every day. I am always very tensed in my upper back but never had pain nor headaches until I did and it never disappeared. Sometimes its only tension headache (level 2-4) but it can easily turn into intensive one (possibly migraine) with nausea and vertigo. I am an anxious, overthinking type of personality and trying to work on it. But having a toddler at home it is sometimes quite challenging to stay relaxed. Mr scans are ok. For the last 6 months I have tried everything. Went to PT, did all kinds of stretching, acupuncture, meditation, warm and cool pads on my neck and upper back, massages. Nothing really works. Analgetics do not really work anymore. My neurologist recommended amitriptyline which was great for the pain which basically stopped but I had bad other side effects and had to stop it. Once I stopped, my headaches returned. Is here anyone who experienced the same? What could help? I noticed I am clenching my teeth a lot when stressed, or also at night and I am getting my teeth night guard soon.