Weed and other drugs can cause paranoid thoughts and exacerbate psychosis, and stopping your medication is very unwise.
Please speak to your psychiatrist, and take your medication. It is never a good idea to try drugs, especially if you have a pre existing mental health problem.
These experiences sound delusional, and you really do need to start your meds again.
I guess my question is, can it be possible that the synchronicities I experienced mean something? Or is my brain trying to fool me?
They might seem to be very real, but it really is your brain trying to fool you. They will stop or be under manageable control with the right medication that has been prescribed to you by your doctor or psychiatrist. Please speak to them.