Im35 yrs old and im wanting to get pregnant. Its been nine yrs since my last child. Should have any studies done before trying to concieve.?

Not necessary. You are in the ""older" age group but conception is still a good bet. Concentrate intercourse mid cycle when ovulation occurs.
Yes. That is a long period of infertility and suggests a definite cause. You should identify a fertility specialist in your area that could do a basic evaluation. At 35 we would also offer ovarian reserve testing that looks at ovarian function as it relates to age. Best of luck.
Only fix if broke. If you try for 6- 12 months without success it would be worth an evaluation. You have already proven you have the parts & they can work. Dad did too. I don't try to fix a problem that doesn't exist.