I had my normal periods on 30th June and then I had my next period on 31st July for 2 days, now I had missed my periods in Aug. I have all the symptoms of pregnancy but when I took HPT on 5th Aug. its negative, can you please help this out

The only way to know if you are pregnant or not is to keep taking tests (morning urine only) every few days or a week. Symptoms are not much help. There are just to many ways you could be either pregnant or not, regardless of your periods or how your body feels.