3 month old- incessant crying: HELP!

I know this is a lot to read but please take the time to read. I am desperate and I’m hoping someone out there has experience what I’m experiencing. I just want to help my son.

He was born back in June and he came out crying and seems like he hasn’t stopped since. Now let me stop most people here because I am aware of colic and I’ve read enough articles to know about it but I’m not convinced it’s colic.

When I first brought him into the pediatrician at his 1 month check up I described to her how my son seemed to always be crying. And it wasn’t like an uncomfortable colic cry. It was a blood curdling cry. (I’m also aware of purple crying, but bare with me) He would scream like he was in pain. His belly would get hard and when I put my hand on his belly, I felt popping and gurgling. He would scream after being fed, changed, held, whatever it was. No matter where I put him in the house, he screamed. My pediatrician couldn’t find anything wrong and suggested I give him a hypoallergenic formula and a probiotic. When we did that it seemed like night and day. I was so excited that he seemed to be doing much much better.

Just last week he has been non-stop putting his hands in his mouth. I thought he might be teething (his sister got her first teeth at 3 months) but I don’t see anything. He gnaws and gnaws at his hands all the time. Then he’s started the screaming again. If he’s not napping, he’s happy for five minutes then os fussy. Doing the heh heh cries then having full blown meltdowns. I don’t think he’s hungry because this is sometimes after being fed. Today he was so fussy. He had so much gas, I windi’d him twice and he had 3 major blow outs. In the car going places, he cries. Can’t get comfortable. He always seems so stiff and rigid even when he’s not crying. He kicks his legs and screams and sometimes turns red/purple and stops breathing before he takes a breath because he’s crying so hard. I look forward to bed time because then he at least sleeps from 6:30/7-11 but I shouldn’t want to wish my days with him away. I go back to work October 27th and I’m scared to death with how he’s going to be without me.

I’m considering taking him to a chiropractor and I also have an appointment for him to see a doctor, but that’s not until October 24th. Pleaseeee help!!