Im Heather. Im 34 and 4'11" and have just got back my blood labs also. My cholesterol is high (dont have my paperwork in front of me) but Dr said I need to switch diet and work out. I have an office job so I need to exercise to make up for an otherwise sedentary lifestyle. Im taking it seriously as heart disease is on both sides of my family and both my grandpas had quadruple bipass surgery. I smiled out of empathy for your fear of having blockage, as I too worry about that. Good news is....I really think a lot of that is just in our head but is certainly a legitimate fear. I believe there is time for us!!! I just started my lifestyle change yesterday. Take heart. We are both making strides in a good direction.
That is an impressive drop in cholesterol and trigs, as well as weight. Well done!
Most studies suggest you can reduce your total cholesterol levels by 30% with strict diet, but without daily exercise it will probably increase again. Another factor is the ratio of 'good' cholesterol (hdl) and 'bad' cholesterol (ldl). hdl cholesterol pushes out the ldl, so the higher the number, the better off you are. hdl can be raised primarily by at least an hour of exercise daily as well as taking specific drugs.
I have spent a twenty-five year old battle with high cholesterol, I'm not a health professional, but as an everyday meatball I'd suggest you discuss with your doctor how to keep your cholesterol levels in check with diet, drugs and exercise. You will get all kinds of advice on line, but your doctor and perhaps a dietician is your best resource. Keep us informed.