When you become angry your body produces stress hormones -adrenaline being the main one-this prepares your body for “fight or flight” . In doing so the adrenaline dilates blood vessels and makes the heart beat faster. Naturally you would run or fight which would then “neutralise’” the effects of the adrenalin. As you do not the effects that you describe persist. The best way to recover is to take exercise such as a fast walk or run.
In general terms -STOP smoking and improve your diet-you already know that-therefore no point labouring the fact.

Do you have high blood pressure? unlikely at your age but always worth having it checked. If you are on the pill it would be checked on a regular basis any way.

The future do as we have already suggested -will increase you chance of long healthy life and a healthy pregnancy at the right time

You don’t normally get light-headed unless your blood pressure is low but it wouldn’t hurt to get it checked out.

Of course the possibility exists.