period scares

Ok, so I had started my period on August 1st and eded on the 6th and started my period again on the 14th and ended on the 20th so I thought it was normal since it has happened to me before but I started my period once again on the 2nd and still on it so now I'm a lil worried idk if it's normal or not... But I noticed it go off like that since I had sex with my partner :/ after a long time...Is this normal?