Lazy Bridesmaid Problems?

This is me venting and asking for advice, all in one. I have done all the wedding planning by myself. I'm not upset about it... I enjoyed making all the decisions. But now, we are 6 months from the big day. None of my bridesmaids have been helpful or offered to do anything for me. 2 of my girls are pregnant and will have their babies before the wedding. One of those girls is waiting until she "loses her baby weight" to order her dress. She is due at the end of June and the wedding is October 5th. The other mama-to-be ordered her dress before her belly popped, and she will have it altered in September after her baby is born. My MOH ordered her dress too. So, two girls have ordered and two girls have not and neither can give me any answers about when exactly they plan on doing so. This is stressing me TFO. Bridal shower and bach party haven't been planned either. So basically I'm having to beg my girls to do every little thing and it's starting to make me angry. IDK... I guess I have always been the "helpful bridesmaid" willing to go to appointments and fittings and help with decorations and invites and planning parties. And my girls are NO WHERE to be found when it's time to start planning my events. It's like no one cares. Two of them don't even respond to my texts. I just don't understand. I'm not asking too much... I know this! Because I have done everything myself so far without asking anything from them. I'm kind of hurt that my girls aren't excited or they are just blowing it off like it's no big deal. How do I handle this situation? I've always been a "go with the flow" type of person so even saying something to them is going to be hard. But I feel like I'm setting myself up for disappointment if I don't push them and my girls don't get their dresses ordered and altered by October.