when do I go to the doctor?


I feel incredibly dizzy, way more than I was with my 1st pregnancy, I often have to stop and sit on the floor.. I'm also experiencing weird stuff with my heart. it feels like it skips a beat sometimes and it will make me lose my breath, it's a really freaky feeling. lastly, in a period where it would normally beat 1 time it will sometimes speed up and do it 10x and then level out. Is this bad??? or am I just pregnant???