You most probably have allergic rhinitis.
There is no need to get any blood investigations done as of now.
Next Steps
1. tab Allegra-M once in the morning and once in the evening
2. tab sinarest once in the morning and once in the evening
3. duonase nasal spray , spray 2 times a day for e weeks.
Health Tips
while applying nasal spray see to that you don't breath while applying. i.e stop breathing spray the medicine and start breathing normally