I keep getting lots of flashing particals in my vision sometimes theres not many sometimes theres loads and other times its like shooting stars 50% of the after these random burts i get a really bad headache others a hot flushes and bad dizzyness with ri

Migraine headache: Your description sounds like migraine headaches but you need to have a complete eye exam to make sure everything with eye is ok. Flashing lights can be a sign of retinal disease so a dilated exam is needed as soon as possible.

Migraine: The attacks are typical of migraine. Try staying well hydrated at all times and stop oral contraceptives if you are on them.