Can you get an allergic reaction to filler 5 months after treatment and how long will the filler last?

I had lip filler and after 4 months i woke up one morning with swollen lips and a swelling in my face. The filler was first washed out with saline and i was given antibiotics. My lips reduced after the antibiotics they swelled again. The filler was disolved in my lips and i had another course of antibiotics & steroids. My lips are back to normal with a couple of lumps but my face is swollen under my eyes. There are lumps which i can massage, they go away but come back later in the day, any idea?