That's right. It would be safer for you and the baby if you weighed less. I was over 200 lbs. when my second child was born. I was ordered to a month's bedrest due to pre-eclampsia and gave birth (induced) during a splitting migraine from high blood pressure. ...not safe for me or the child. ...not too good for my job either.
I had a young friend who actually had a stroke during childbirth because of high blood pressure.
I hate to scare you, but please don't put yourself through it! Do whatever you can to safely lose the weight!
I wish you the best!