Is it normal for my 7 month old baby to keep pulling at his ears even though he has been in amoxilin for 7 days due to having an ear infection?

Not to worry. Pulling on the ears is a very non-specific phenomenon and does in any way indicate an ear infection. If your doctor has put your child on an antibiotic, it is his(her) responsibility to make sure the diagnosis is correct and that the ear infection has completely cleared. Also, remember that many ear infections are caused by viruses for which there is no specific therapy.
No. Get rechecked for fluid or continued inflammation. May need different antibiotic, or rarely drainage of middle ear- myringotomy.