Having another child

I’m struggling because my husband has always said he doesn’t want to have another child (he’s got 2 prior to our 1), and I only wanted 1 and felt complete. Before I became a mom I wanted multiple so they could have a friend and play when the step-siblings are away, but after having 1 I’m feeling lots of feelings: I don’t want to have another because I love this one so much and I don’t want to share my love, this ONE is a handful, how could I stay sane and raise TWO with my schedule and lack of support, but at the same time I do want my child to have a full sibling to share a life with 😔 just feeling all the types of mom guilt lately and wanting some feedback and validation ❤️