Anyone???

I'm 31 an I desperately want another baby but I seem to be having a hard time conceiving. It's so frustrating. I've Bee of bc for close to a year I have regular periods it can be occasionally a week late but not typical. I was convinced it would happen this month because my partner an I have been having a lot of sex in the past few months. My hair felt more greasy than normal even though I kept washing it I'm constantly hungry an tired. I do have hypothyroidism an my levels got better suddenly I'm on the medication an have been since my early 20s I don't know what is wrong with me does anyone have any suggestions? I have a very light period that was 4 days late