Your pain seems to be because of sinusitis
as your doctor has examined your ear and has told you that there is no infection. Please use nasal decongestant drops for 4-5 days and take lots of steam. Anti-inflammatory you are already taking. In case the swelling reappears or pain worsens, do consult an ENT who can ask for an X-Ray PNS. These medicines can be taken by nursing mothers. Take care.