Heart rate 125-135 , diziness, weakness.

I was having dizziness and sudden weakness in legs and Hands cramps in neck little ache all happened suddenly i checked my heart rate it comes 125-135 and too much gas passing burps and tighten stomach i went to doc and he gave Ivabradine 5 mg Rifagut Rabitop ls GFH HEPA AND PETRIL MD 0.25 I took all but forgot PETRIL and was resting again I felt little pain middle of chest very mild for some seconds and i suddenly stand up and I was feeling like fainting very much weakness in legs and Handa feels like tingling and ache in legs and hands went to doc again and he did ECG it came out normal then he have me Cordiorostin 10 asp I want to know do i have heart issue or could have heart attack i didint go to doc should I go for more investigations ,WHAT TEST SHOULD I GO FOR TMT OR ECHO ? And also I missed petril 0.25 can I take it now is it safe to take now pls respond 🙏