Thanks for the query.
you might have got a bite during sleep.
Weakness cannot happen due to wasp bite but surely you will be troubled due to these bites which can cause weakness.
Take some steroid
tablet this will help in faster healing.
also take antibiotics which will prevent infection of bite site.
Please meet a dermatologist
for exact diagnosis.
Let me know if you have any other doubt.
you can ask a direct question to me on this forum, following the below link.
Wishing you a good health.