I hear how much you are struggling right now, and I want to start by validating your experience. Managing a demanding IT career, a 5-year-old, and a pregnancy is already a significant feat. Adding the weight of escalating OCD symptoms on top of that is incredibly taxing.
What you are describing—specifically the fear of accidentally "contaminating" food with household chemicals—is a very common manifestation of OCD, often referred to as "Responsibility OCD" or "Harm OCD."
It is very common for OCD symptoms to flare up during pregnancy. This happens for two main reasons: biological changes and increased responsibilities.
The videos and photos you are taking are known as "reassurance seeking" and "checking compulsions." While they provide a few seconds of relief, they actually keep the OCD cycle alive by teaching your brain that you cannot handle the uncertainty without proof.
Next Steps
consult a mental health practitioner.
Build a "Support Buffer". You are currently trying to do everything while your "anxiety tank" is full. If possible, delegate cooking or cleaning tasks to your partner or external help for a few weeks to reduce the number of "triggers" you face daily while you begin treatment.
Health Tips
consult a psychologist.