Embarassing...Masturbating and Water Breaking?

I am so embarassed to be asking this 😳 My SO won't have sex with me because he says it feels weird, but I know how orgasms can help the uterus to prepare for labor, so after he left for work this morning, I figured I'd spend some quality time with myself for the first time since getting pregnant. I didn't use any toys or anything, and only barely penetrated a few times, but as I was rubbing pretty hard around my clitoris, I felt warm liquid oozing down onto the bed 😳😳😳 When I got up, I saw a sizeable wet spot, about the size of a cake plate! I've never squirted before, and I'm not sure if I've ever reached an orgasm either, but I think I did today! (Thanks pregnancy!) What are the odds that I accidently broke my water? I guess all I can do is sit and see if it keeps leaking? I am having some mild tightness in my stomach, but it could be from the orgasm.

Please, be kind! Here I am just trying to get my rocks off and I have to change the sheets 😂 35+4 today.