heart palpitations and breathlessness since week 5.

Hello mummies I've been having heart palpitations and breathlessness since week 5. Am now on week 6 and am feeling it everyday. I'm already walking really slow and all but I'll feel the heart palpitations and breathlessness everyday as I'm on my way to work. Sometimes it gets so bad I had to take a seat somewhere and reach work late. After lunch I'd get giddy spells so bad that when I get up of my seat I feel the room is spinning. Anyone mummies experienced the same?please share any advise if any thank u!#pleasehelp #advicepls