Firstly, please do not research off the internet and believe it to be true. Just because you exhibit certain traits it does not necessarily mean you have a mental "Illness". So please take a deep breath.
If you have been professionally diagnosed please do follow the treatment pattern and talk to your therapist about how you feel. If you were autistic your doctors would have seen that right away.
Next Steps
I can agree that you maybe socially uncomfortable. Sometimes our personalities need a little upgrade. If we are too low on confidence or self esteem, it tends to affect our identity. We get uncomfortable in public and act "Odd". It may seem like a disorder but it doesn't necessarily need be one. In my opinion, please visit a Psychologist and enroll in personality development workshops that happen in the city or online. It will allow you to understand yourself better to make a judgement.
Health Tips
Please don't delay in opening up about it. And speak to your doctors.