Stuck at 155.4 lbs for months!

M

No matter what I do I can’t even lose that .4 pounds! Advice please!! I’m not consistently working out but I have a 13 month old and watch a 12 month old, have a farm and seem to constantly be moving or lifting either a baby or something outside. I don’t drink much of anything but water, we eat pretty healthy majority is fruits and veggies and I sleep about 8 hours a night. I’m at a loss!! And so frustrated! I’m 5’9” and 4 years ago I was 120, went on birth control and got up to 170 within 2 months, went off and got stuck at 160, got pregnant went up to 190, and now been at 155.4 since 3ish months ago.