I just went throught the same thing. It was my third time on the gear and every other time I did everything to a "t". Cardio every day, a strict diet with only 100 grams of pasta for lunch; and veggies with every actual meal. Also
I've been taking fat burners for a while; about five years or so, on and off.
On this cycle I was doing fine until me schedual got crazy, My diet after my third meal was bad and I ate what ever I could.I stopped doing the cardio for a month or two, tops and then everything went wrong. I had heart palapations, insominia, my blood pressure rose as high as 160/140 for a day; my concentration went out the window. I ha already stopped the fat burners and it still persisted. When I saw the dr he did his test and found nothing, so he asked me what else I had been doing, since there was no other choice, I told him.
He sent me to a cardiologist and I had a heart haulter on for 24 hours.
When I saw the cardiologist he checked the haulter and found that although my heart was fast it wasn't irregular. Now I'm going to do the stress test and something else.
More than likely your going to have to do a softer cycle now. If it was going to happen it was going to happen, your just going to have to adapt. Once you start fucking with your blood pressure and your heart you need to chill man. Plus, cardio is a must now along with getting rid of any breads or pastas. Also, I've now heard there is an anti estrogen that will help too. Garlic is good also.