OCD getting worse with stress

♡ 𝓚𝓪𝓽𝓻𝓲𝓷𝓪 𝓵𝓸𝓾𝓲𝓼𝓮 ♡
It's nearly a year (1st April) since I got married , which ended months later & im still getting over 
And I'm getting counselling but generally speaking my anxiety is playing up again , as it did before. I'm always indoors as no one invites me out and my friends stopped talking to me. But now basically my OCD , which is really damn weird .... has kicked in again and it's got worse.
Not only do I make an average trip out awkward by Double / triple checking everything's off and away or closed etc but it's when I even go to sleep. I nip to the kitchen , only open one cupboard for example but still make sure the stove, fridge and freezer and oven are all closed / off. It's not just a one thing either. I have to press the fridge/freezer firmly 5 times and physically glide my finger over the off switches on the hob.
It really is annoying me now. I know how to solve the thing of leaving the house. I tell my sister ( who I live with ) not to let me be the last person out cause I then pull at the door loads to reassure myself it's definitely locked but idk if she just thinks it's funny not to listen to my instruction.
Why do people get like this ? Most of all , why me?! I feel like abit of a freak!! 
- reasons causing it ? .......
My mum has an undiagnosed mental condition but she would steal our purses or debit cards / cash , even if we had nipped out the room and I remember once clearly putting my card away and I went to buy something online. Went to get my card only to find it was gone. Panic kicked in as I retraced my steps and called up my friend asking if he saw me definitely put my card away the night before, which he did.
Long story short ... I had checked my coat pockets and as my back was turned my mum popped my debit card back in and then said .. check again, so I did and it was there. She had taken it. It's not the first time either I was always hiding stuff from her
Do you think that plays a big part?