Hi NorCal!
Welcome to our community officially!!
I'm so glad that you found our forum to be so helpful!
WOW! What a great PC you have!! That's awesome!
While many find that their first symptoms are the last to leave, please be careful 'assuming' that this is true for you with you having had only that short run of abx. Honestly it sounds like more of a herx than you nearing the end of your treatments.
These bacteria come out to replicate in the body once every 3- 6 weeks, so 4 weeks of abx may only catch a small amount of the bacteria - if this is the case, then you would also experience a relapse if you were to go off of your treatments too soon.
If you don't wish to stay on the abx any longer, please consider herbs or other natural treatments. Many find that they work just as well for treating their infections.
Also please be aware that the blood tests for co-infection are less reliable than it is for Lyme disease. It's always safer to go by your symptoms.