I have a constant feeling of needing to pass out, my heart rate is over the roof and this is like…

I have a constant feeling of needing to pass out, my heart rate is over the roof and this is like every time I try walking anywhere.. I'm getting so sick of it I can't do shit! And I feel so bad for my boyfriend cuz he does everything and once he asks me to make him something to eat or anything I can never finish it and he always has to cuz I can't stand for that long and once it comes it don't go till hours!😣😣 ugh I hate this feeling it hurts me...