Cholesterol is regulated by hormones in the body just like sugars; it's metabolically regulated. There have been studies that show that eating one diet over another does nothing significant to raise or lower your cholesterol, in fact, there are some that have shown that eating large amounts of cholesterol laden food will reduce the amount your body produces and actually lower total cholesterol.
There's no significant correlation between diets high in cholesterol and heart disease either. There is a prevailing theory that politics, namely a pro-vegetarian Doctor, is what led to the Government recommendation to reduce cholesterol in diets and that high amounts of it were bad.
Something to think about ... not everything in the books is right tomorrow. I remember when eggs were chastised as killers.
+1 to the above.
You could try a no-flush Niacin supplement. Garlic seems to help, too.
For the love of God, please don't poison yourself with any of the statin drugs. I took one for all of 2 weeks, I got to where I couldn't climb a flight of stairs. I immediately bailed on it, and don't really care what my cholesterol levels are. After that, I will never take a statin, again. Not to mention all of the negative things posted on the net about them. Not that they are necessarily right or wrong, but it does get you thinking.
OP go to a doctor. As someone posted before. You're problem could be anything as minor as acid reflux.
Dietary cholesterol has very little to do with blood cholesterol. Cholesterol is manufactured by your body.