What Causes Dizziness, Lightness In The Head And Vomiting?

Hi drs, im 31 female complaints since few days daily i feel early morning dizziness,as soon as i get up from bed i feel lightness in my head,vertigo,vominting sensation,weird to breath, presyncope like blurredness,bpmonitor shows bradycardia.but this settles down by itself if sleep back for a while or if i vomit & i feel obsolutely normal & active in no time. It mostly happens early morning occasionally other times of the days.when i was 10 i underwent complete cardiac profile,as the doctor found some missed beats & diagnosed it to be benign ventricular arrhythmias.since then i never used any medication for this. i hv severe motion sickness if was ok for a while but some again,which makes travelling difficult for me.i hv h/o migrain also.but it subsides just with a paracetamol.obsolutely normal otherwise. What do u think is wrong with me?can i excercise normally? can i plan for a pregnancy-IVF as i hv h/o of ectopic pregnancies