Is progesteron in the 1st trisemester needed?

I am coming from Indonesia and live in Germany.

When i knew that i am pregnant, my mom and indonesian doctor told me to take immediately a Progesteron Capsul (to keep the pregnancy balance) and Folic Acid + Jodium.

Today is my 6 Week pregnancy.

She (Indonesian Doctor) also said that i should not do sport and hiking,furthermore sex should be also reduced (once in a week) at the first trisemester

Because i live in Germany, It has somehow different procedure, not like in Indonesia.

I have feeling they want everything going naturally.

Doctor gave me only Folic Acid and Jodium, he will take my blood on the 8th week. He also said that right now i don't need any progesteron capsul.

I still can do sport, if before pregnant i am an active person, just do sport (i used to be active and am super active, its kinda wierd if i cant be active) .

And it's still allowed to do sex.

I am much confused, because the procedure and instructions from. Indonesian and german doctor are different, i don't know whether i need progesteron or not.

Am i allowed to do sport without progesteron?

I did Hiking last week as well.

When i read articles the 6-12 weeks is the critical weeks.