Brandon, just take it one stage at a time. Like Debra said it really sounds like you aren't over the injury yet. I'd be inclined to get a clear diagnosis to be certain your rehabilitation is appropriate and adequate before assessing your readiness for either marathon. Perhaps try to consider another one after the later one so you have a back up plan in case you aren't race ready for either of your two races. No race is worth risking worsening your comeback and good health for! Good luck.
And he makes the podium again powered by plants! Well done BadBark! Excellent form there. You mention some of your tapering tactics but would you mind telling us a bit more about how you balance the nutritional requirements of the training with the vegan diet? I am mostly vegetarian and struggle with the protein.