What the f*#% is wrong with my body?!?!

Got Nexplanon out in late May. Had my period at the end of the month on time, just much lighter.

Got my period 35 days later.

Just started my period two days ago after 21 days. But this period is heavier and the blood is thin and bright red (this is not normal for me). My blood also has a sour or vinegar like smell to it.

Any ideas??!!

Why are women’s bodies so effing complicated?!