hello.I am 40 years old and have been getting these awful attacks of near fainting spells.I do have multiple sclerosis .usually once to twice a month and usually around my period i get these attacks.it sometimes can start off with me feeling sick inmy stomach and thne suddenly i will feel like im gonna pass out and my heart rate jumps up with it as high as 180 bpm. i feel as though i can not breath and it scares me terribly. sometimes i can just feel so out of breath and then the near fainting spell will come on, i went o my heart dr and he did a ekg and echo and both were fine.i wore monitors for 5 weeks and they did catch one of my attacks of the heart rate being 179 bpm.they then tiold me it was a tachycardia arrythmia . now i went yesterday and had a repeat of the ekg and echo and al was fine and dr said this seems like i have pots.but he doesnt take his time with me to explian everything. he told me to have a tilt table test to confirm it but i am scared to death of this test due to my fear of passing out.so my question is could this really be pots.i am dizzy all the time i black out alot when i stand up.my blood pressure is usually around 92/65 when i stand up.the lowest i have had is 89/58..that should give you and idea of my usual blood pressure.but when i have these attacks of high heart rate it usually jumps up to 135/90 sometimes higher. if i didnt mention it before i get this attack usually once a month and usually a few daysbefore myeriod.this month i got the attack on my second day of my cycle.oh and always in the mornings is when these attacks occur.the latest i ever had one was around 12:30 in the afternoon, i have an 11 year old son and i barely go anywhere with him now due to my fear of passing out.and im always short of breath. i always feel like i can not breath.its like a fish with out water. is this part of this pots. thanks for taking the time to read this.