"No help received & very disappointed"

I called for ambulance Thursday early morning with very high blood pressure (220/110 ) and very intense pain in my chest and my left side.

The ambulance never arrived, so I went to A&E myself. I was there 12 hours. I had some tests done however I was not told what was wrong with me. I asked why my blood pressure jumped so high because I never had so high blood pressure. The nurse said it is because I have very high cholesterol but I did not received any medication to lower my cholesterol. I received the prescription for medication for high blood pressure and they said I can leave and go home, I went to buy my prescription and they told me the medication I have been prescribed was no longer available.

I was not given any advice and I do not know that to do moving forward.  

I have gone to my GP however they do not want give me any medication to lower my cholesterol. They said I need to wait 2 weeks and then book appointment to do the blood test. I am still weak and feel pain in my left side and I am left without help. 

When I do not mind spending so much time waiting, I understand the NHS is overwhelmed, I am really upset I did not receive help in this serious situation. I am in my early fifties and a single mum, I am upset and scared as do not know what to do and where to seek help.