Really needing advice

So I’m 20 years old and I’m ttc my first child with my fiancé. I am well aware I’m young but I have a LONG family history of difficulties trying to conceive, it took my mom 2.5 years with both me and my younger brother and both my grandmothers about the same amount of time.

HOWEVER! I have a long history within myself that is irregular periods that will vanish for months and then make their bloody debut like the Phantom of the Opera!

I have my first pelvic exam on Thursday (central time zone) and then she wants to discuss getting me on birth control and some blood test results. I was on birth control for 8 years and it solved NOTHING with my irregularities and just made periods miserable enough I was basically gone from school maybe 4 days a month (back then aunt flow only visited for about 4 to 5 days) During July of 2017 my mom had me on the depo shot and not a month after I turned 19 my insurance dropped me and I had to quit the depo (still 2017 and had only 3 shots) I have been off birth control for 1 year and I will NOT go back on it unless I’m going to die. I have looked over my options to regulate my period without birth control and I need help. I’m desperate here and broke as a goat on a tight rope! Any advice would be great.

Note: this doctor also had the NERVE to tell me, a patient, to “wait until after you’re married.” Honey I’m not forcing my man to marry me! Not after the hell he went through with his ex wife (which he’s still having to pay for 🤬) I just need some advice...anything to keep me from smacking the daylights outta her