Pulling sense in left eye. It happening?

Hello Doctors, Its been a month after my Lasik Eye Surgery. My vision has been normal & had attained full clarity from -6.25 before to 0 after Lasik & am continuing with Optive Fusion drops as prescribed & taking all precautionary care. However, since past 2 days I started feeling a slight pulling sensation in the left eye & the left eye was slightly more red + plus a mild headache. I applied a Tobramycin drops as well for 2 days. Then I got it checked with the same Lasik doctor & she said there is nothing to worry about, but has prescribed me Vigamox Eye Drops for 8 days. The pulling sensation has reduced a bit, but I still have it sometimes with a mild headache. I have attached the doctor's follow up report. My question is do I need to worry about this & why is it happening?