Strange long lasting heaches

Hello. I was having some problems with my anxiety about 3 weeks ago. I was worried and stressed daily. I finally managed to get grip together.Only thing that bothers me now is my headache.I don't remember when exactly it started, probably 3 weeks ago when I was still worried sick. First it was sharp pain on top on my head and it was giving me dizziness. And after that I started to feel different kind of pain. It was pulsating one. It was changing spots from one side of my head to another. Now in the end of the week pain got less severe, it became dull and bit different. Now sometimes I get stiff neck for couple seconds. It comes like a cramp or a spasm and it goes away, but pain moves upwards and goes to side of my head and starts it's journey. Usually I feel pressure in my nose and if I concentrate I can feel as air or something that causes pressure goes through tubes behind my nose and then it relieves me of pressure. I felt some pressure on my cheeks too. But I have no fever and my nose isn't runny so I doubt it's sinusitis. In the mornings I don't feel the pain, only very light dizziness. Pain only appears after about 40 minutes. And it's light in the morning. I go to sleep with an headache and I wake up without it. When I shake my head it doesn't hurt. When I lift heavy stuff I don't feel any changes too. Sometimes it feels like 3 types of headaches are mixed together. I went to the doctor but it will take 17 weeks till I get CT or MRI scan so I was wondering. Should I be concerned? Can it be brain tumor? I have some red flags about changing pattern and dizziness and chronic pain, needles and pins in my limbs, but in same time I never had a seizure, vomiting, and cognitive impairment.I don't really know what to think of this. Thanks for Your time!