I'd [36M] like to propose while she [33F] is pregnant with my child. Do I wait until after she gives birth?

This might seem like a silly post, but I'm genuinely so stressed out over this. To give you more info, both me and my girlfriend are divorcees. We both also have children from our first marriages.

She's currently 26 weeks pregnant with a boy. We have talked briefly about possibly getting married one day, but we both would be okay if it never happened as well.

Except, I already have a ring, and I booked us a lake cabin for the first weekend of July. She'll be almost 30 weeks then, and I'm worried she won't say yes, because she'll think it makes her look like she's getting married just because she got pregnant.

The reason I think that could happen is that months before we found out about the baby, one of her friends (people she follows on Instagram) got engaged, and then posted about being pregnant. My girlfriend commented on how she probably only got engaged because she got knocked up. She later mentioned how it really wasn't nice of her to think that, and that she wishes her friend all the best, but yeah... I'm not too sure if she'll find the engagement post worthy, and I want it to be her special moment.

So, would it be better if I waited and proposed after she gives birth and we're past the newborn frenzy stage?