Hi Dear !! Thanks for your query to HCM . Read and reviewed your query and health concerns. IN the given situation, You seems to suffer from-Hypokalemia with Muscle cramps of inter-costal muscles.Scary feel is from low potassium levels. Neck hurting indicates low potassium causing cramps. Remedy- Would be to take- a glass of-Orange juice and banana shake-to supplement potassium and to raise accompanied glucose levels. Magnesium supplement-with nuts/lentils supplements.Be on high glucose diet,which would keep potassium to needful levels. Check out causes of low potassium in your case-like diuretics, diarrhoea,magnesium laxatives,antibiotics etc. And reduces stresses from work. All this would reduce the yawning from weak muscles with low potassium levels. Check out blood sugar levels and potassium levels and consults with Physician would be needed to fix this issue immediately. Hope this would help you to plan further of this complex illness of yours. If need be, update any health issue 24 x 7 by a direct question to ME, at following HCM link-http://doctor.healthcaremagic.com/Funnel?page=askDoctorDirectly&docId=70229 Dear, if satisfied,Don t forget to close this query with YOUR pleasing feedback comments to rate this reply and service, to boost the morale of incoming Emergency patients like YOU, at HCM services. If you want to update more details and ask more update queries , You are most Welcome herewith !! Good Day!! Wishing Good Healthy Life in time to come!! Dr.Savaskar M.N. Senior Surgical Specialist M.S.Genl-CVTS