Planning for Pregnancy age of 35 yrs, Do i needs some test

Dear Doctors,
I have 2 kids one is of 2 yrs 8 months & younger one is 8 months.
Elder was C-section & younger is a norma vaginal birth.
After last delivery i was observed with a minor hernia close to my naval.
Consulted with surgeon & he said surgery is the ultimate solution but i do not have any pain with hernia.Surgeon adviced if u have wish to have baby so plan ur pregnancy & then after delivery go for the correction of hernia.
My age is 35 yrs now.
I did my RUBELLA IGG test 2days which is positive with 73.72
As i heard pregnancy after 30yrs of age may have some complexities once woman getting older egg quality are getting degraded.
Infact i am having plan to go for pregnancy as soon as possible although have a 8months baby with breast feeding.
I did not have my period after the last delivery till date.
I consuted gynaecologist 2days back & discussed all these ,
she did pregnancy test which is negative then she prescribed me NORETHISTERONE ACETATE 10mg mor/eve for 5days to start my period then after she adviced to plan the pregnancy.
I need ur feedback in this respect.
Do i needs some test befoe getting pregnant?

thanks