Thanks for posting your query.
From the information you have provided,
What you are experiencing might be due to 2 reasons:
1. Yeast infection- commonly candidiasis
2. Tears due to intercourse- presumably due to dryness/force
3. Allergy to latex- in condoms
Plan B is not the reason for this.
Antibiotics can predispose you to
yeast infections.
So, please meet your doctor to clarify the reason and treat accordingly.
While you are getting treated for yeast infection, its best to avoid penetrative sex until the infection is cured( 2-3 days).
If its due to dryness, you can use lubic jelly which is a lubricant. Spending more time in foreplay can also help.
If its a proper tear due to force ,we need to let it heal. Superficial healing takes 3 days and it will be a week for you to feel totally comfortable.
Again, its best not to engage in sex during the first 3 days of healing.
If its due to
latex allergy, please use non- latex or polyurethane condoms.
All the best, Hope I have cleared your doubts!
Please, do not hesitate to contact me for further queries.