Re: Getting Pregnant Advice
Welcome to the forum!
I think it's much too early to worry. You've only been trying for 4 months. And unless you're over 35, a fertility doc wouldn't even want to see you until you'd been trying for 12 months without success.
Since you've had your period back since 7 weeks, you've probably been ovulating since around that point. Once your period is back, breastfeeding is not supressing your fertility. If you want to know for sure if you're ovulating, there are 2 ways for you to do that. The first is the fertility awareness method (FAM), which relies on basal body temperature and observation of fertility signs (cervical mucus, cervical position, openness of the os, etc.) to predict when you're ovulating. Toni Weschler's book "Taking Charge of Your Fertility" is an excellent source for learning about FAM. The second way to figure out if you're ovulating is ovulation predictor kits. They're a bit easier and a lot less time-consuming to master than FAM, but they are also more expensive and don't work any better than FAM.
I honestly think you have partially weaned your older child for no reason. And while I really don't want to make you feel bad about your decision, I do feel duty-bound to repeat the recommendation that breastmilk should make up a baby's majority source of nutrition until 1 year.
There are a lot of good reasons why natural child spacing typically results in children being born about 2 years apart. The first is that the hormones of pregnancy usually destroy a mom's milk producing ability. If you were to become pregnant right now, it is highly unlikely that you would be able to relactate and nurse your current baby. It's much more likely that you would lose whatever supply you have at this point. The second reason babies are typically spaced every 2 years is that pregnancy is hard on a mom's body. You want to give your body at least a year to recover from the demands of growing a baby. The third reason for the 2 year gap is that taking care of "2 under 2" is HARD. Double the diapers, mess, sleepless nights, etc..
If I were you, I'd unwean the baby, get up to speed on FAM or use some OPKs, and not stress about achieving what you think is your ideal child spacing.
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"