hen did your tummy get hard in pregnancy?

Im curious when some of you mothers stomachs became firm in your pregnancies. Mine took 6 mths first time. I was 118 before that pregnancy. Took 5.5 mths 2nd time, 3rd time took 5.5 mths but this 4th pregnancy it was hatd by 3 mths!! Im 19 wks on thur and it looks freaking huge andcalready is unvomfortable. I honestly look and feel 6.5 mth instead of 4.5

My belly was never hard unless I was having a contraction or baby had their back turned out. With this one I started feeling a firm spot from her back being turned out at around 14 weeks.