I wouldn't worry about seeing your own name in the 'from' address. When sending email, the sender can insert any 'from' or 'reply-to' address they like, it doesn't mean anybody's hacked your email. I see that in spam all the time, I guess spammers think people are more likely to open it if 'from' and 'to' addresses are the same.
The ability to use 'fake' addresses is a legitimate feature of the mail protocol. For example, I do it all the time when I'm sending from my ISP's email service where my real address might be "7lm@--------.demon.co.uk', whereas I set the 'from' & 'reply to' to my private .com domains, "7lm@-------.com, so the receiver thinks that's where it came from. Similarly, I have mobile phone accounts of the form "7lm@--------.vodafone.co.uk', and again, I 'fake' the addresses in sent mail so it looks like it came from "7lm@-------.com".
It's worth running malwarebytes as suggested by UncleUB if you think you accidentally opened a malicious email, but (as long as you didn't open any attachments) I'm betting your system will be fine.
- 7LM