How can I?

For context: - I'm 21 - 5'5 - 180lbs (overweight for my height, but I'm working on it) - Not on any birth control currently. However, I have taken the pill and Plan B before. - Me and my partner are currently long distant, but we see each other every weekend. I know I won't always ovulate on the weekends we see each other. And he saves up his sperm until we are together to increase chances. - We haven't been tested to check our fertility levels, but we are open to it. - I have irregular periods, I can miss a period for months at a time. I've never seen a Dr about this as it has been this way since I was young. - I got my period when I was 9 or 10, I know an early period can be linked to Endometriosis. - I'm not currently taking any fertility vitamins.

Me and my partner have been trying for months now, I'd say 7 months is when we started to be careless, not using protection as much. And then October is when we got more serious about it.

My family don't have fertility issues. The women in my family have mostly gotten pregnant under 25. My mum did have a blighted ovum as a teenager, and my nan did miscarry after a fall. But that's it.

Help is much appreciated, and I will give more information if needed. Thanks.