Hubby and I are ttc #2, with DS now 3 months old. He is ebf, wakes once or twice at night for a feed unless he has a growth spurt in which he feeds every 1-2 hrs. I got my first AF at 7 weeks pp, It's now 13 weeks pp and no sign of AF. Neg hpt 2 weeks ago. I like to bf, especially as its free and so good for him. But I'm wondering if I should start supplementing with formula, just at night, to increase my chances of conceiving? I am charting my bbt to check if I am ovulating, but the temps are all over the place, and at day 40 in my cycle I would have thought there'd be a sign by now that I either ovulated or that AF was coming. So, trying to decide either supplement at night, or just wait till he starts solids in a few months?