I have a stiff neck a stomach that doesn’t digest and swollen eyes?

Hi. I have no allergy, some diabetes and heart problems ( grand parents). I have a stiff neck a stomach that doesn’t digest ( want to vomit up to 6 hours after eating) and my eyes are very swollen from the morning for at least 5 hours. This started 3 days ago just after my periods finished. Also some pain and discomfort in the chest a few times a day. Can you please advise. I am a smoker, 31 years old born in Niger and (living) in London.