What Is With Wedding Drama?? Will it End??

So, this year has been pretty crazy for me, my sweet fella proposed June 1 2018 (my birthday) which I'm still soo happy about and can't believe we've been engaged a year already! Our wedding is 4 months away, and despite some minor details and STRESS it's coming along. However, I didn't realize I was going to have soo much drama with people during this planning process.

Soon after my engagement I had already known my wedding party. I ended up picking six of my closest friends. Two from college, two from work and Two hometown pals. It was pretty perfect.. however, one girl took herself out after I told her her new bf couldn't come.. my fiance is a cop and has groomsmen (also cops) who've arrested the guy multiple times for drugs and battery . Soo yeah that would've been awkward... (she was in a longterm relationship with another guy when I had asked her).
My eldest brother caused much grief after he dated a woman who tried to say he got her pregnant but we then discovered it was her newly separated ex husbands baby. Then my brother met his current gf Who he dated a month before proposing in Jan. He then proceeded to message all our relatives to tell them his wedding was Aug. 9th , which is 2 months before my wedding. First his gf tried to say her mom was ill.. which turned out to be false, then he made a point to tell our mom, he had to get married first, since he was older than me... guess who eloped last month and keeps saying he wants a divorce ... Bingo.. my brother. I had gotten over the initial date issue, as my fiance said we'll have our wedding, he'll have his. However, my brother sent my mom a very jealous text , that told her "he hoped she enjoys her new son-in-law, and that he hoped someone caps him in the head his next shift, since she likes him better."...... needless to say I haven't had contact with my brother since.. and have no intention of meeting my new sister-in-law

Lastly ,the icing on my drama cake my MOH, friend of 10 years, has literally shut me out. And has gone back and forth since January, telling me that I don't care about our friendship, ect. Which isn't true, but she's been soo negative and won't allow me to try and make it right. She refused to look at dresses with me, lied and told me she was working, and instead took time off work. Lastly is accusing me of first not making plans with her, then accusing me of standing her up. Which isn't true, she uses her made up story when I try to set up a time to hang out. She refuses to tell me where she lives, before I moved in with my fiance, she lived in apt. With her guy friend/ ex bf.
I told her I asked her Male "companion" as she calls him. And first she says, "Why didn't you ask me?" I said, "I have multiple times, may I have your address?" She goes, "You can give me invites in person" ...... even though she refuses to see me. So today I asked my good college friend to be my MOH because I don't see my 10 year friend coming through, if anything I just see her finding away to tell me I'm aweful right before my wedding. I personally believe it's because life got busy and changed for me. I moved farther, added two pups to my life and can't just make random plans like we used to do. Which I told her I was sorry about, but I can't mend it if she's not going to give me the chance to.
Has anyone else had to deal with this much drama while planning your wedding? How did you get past it?
I'm praying the next 4 months is smooth sailing, I just don't want to deal with anymore negativity. Sorry this is such a long post!