thanks for your query.
Please do not take drugs like levothyroxine
by yourself, without prescription.
Ideal TSH level
peri conceptional is 2. 5, so yes, 4.9 is slightly elevated, but nothing to worry about
Also, your level now is perfectly normal, but you should take the levothyroxine as per prescription and dosage of an endocrinologist
The level of 4.9 is considered normal by many books and earlier statements, so it is definitely not high enough to cause damage to the baby.