Hi..I have gone through your question and I understand your concern.
If I would be your treating doctor then I would come up with following possibilities in your case:
1) First possibility s of Nutritional
anaemia.Please check whether you have breathing difficulty as well.I would suggest you to get Hemoglobin(Hb) % and Iron profile.
2) Second possibility is of
Diabetes mellitus.If you are in middle age then please check whether you feel excessive thirsty,hungry and need to go for urination frequently apart from
weight loss.I would recommend you to get the Fasting as well as Postprandial (post meal 2 hour) blood glucose level done.
3) Third possibility is of
Post traumatic Stress disorder.As you had car accident 4 months ago which might have lead to mental and physical distress
I would suggest you to get Hb% and all
Hematocrit values(MCH,MCHC,MCV), Iron profile, FBS and PP2BS done and consult your physician. I hope this has answered your question.Even if you have any queries ,feel free to ask me.
Regards
Dr.Hamid