Stimming with gum advice

I’m in my 20s and only a couple of months ago got diagnosed with autism. I’ve also struggled with ocd my whole life. I’ve had a very stressful year and am finding the process of understanding myself at last to be really draining and it feels like my autism is now turned to the max since I finally know it’s there - a common experience I’m sure but it feels so scary. To cope with the stress of this year I accidentally developed a gum addiction and it’s truly become out of hand. I chew about 2 of the 46 pieces tubs a day - £2.50 each and it’s the sugar free strawberry flavour. It’s been this way for 6 months and my gut health is terrible and I feel so ashamed. It’s become my relaxation ritual - YouTube, a phone game where I put 3 pieces in at once for each new level. The ocd and autism in me are making it really hard to cut down or relax in any other way. I know this is part of bigger mental health stuff I have going on but if anyone can relate or offer any suggestions I’d be so grateful. I just feel so lost and stuff like this is making my self esteem even lower