<human>: Can you succinctly summarize the text in 1-3 sentences?

Hello there! So one of my close friends is getting married this summer, approximately three hours away from where I live. So it's a mini-destination wedding that will require an overnight stay. 

My longtime SO & I broke up in December, of which she is aware. As life would have it, I am pregnant and will be 8 months along when the wedding takes place. I received the invite yesterday with no plus one - I checked with another friend and confirmed he had a plus one just to ensure I didn't miss anything. 

The father of the baby and I are kind of up in the air relationship wise, nor does she know him so I get why there is no plus one. However, I simply cannot fathom going to a wedding that far away, by myself, when I'm that big and unruly - far from my doctor, hospital, and my entire support system - and worried what would happen should something go 'wrong'. 

But I also don't feel right going "Hey, if I can't have a plus one, I'm not coming". I know they've had struggles with their guest list and it's not in my nature to even make a to do about it since it's not my wedding to begin with! 

So is it best just to decline now, with a polite explanation, or somehow ask for a plus one? I'd love to go but I'm truly don't want to make a hassle if at all possible. Also of course, would not like to make her mad by not going by myself.
<bot>: invited to a mini-destination wedding when will be 8 months pregnant with no plus one. Have no desire to go alone.