Hi, I Got My Last Period On 7th Of July

hi, i got my last period on 7th of july and after a week we were nt sure about the intercourse so i took an ipill. i hd bleeding on 24th july for 1 day.. since then i m nt getting my periods till date its 27th august.. i took the pregnancy test 2 days back at home and it was negative. please tell me is there nything to worry