Besides lubricant, what options could relieve post sex vaginal pain/microtears?

Need a visit: This is a tricky question. If you are experiencing vaginal dryness requiring lubrication, then this might be the problem that you should seek care for before you make further attempts to treat the problem of recurrent vaginal tearing. You might try other lubricants (astroglide) and consider that birth control might cause vaginal dryness.

Estrogen cream: Sometimes, atrophy (or thinning of the vaginal walls) is the cause of post sex irritation. In that case, estrogen topical cream is a safe and effective treatment. But there are many other causes of vaginal irritation, and each one has a different treatment, so it is best to be examined and get a diagnosis before treating.