Pain in throat, oral sores. Else.

Hi, I'm 27 weeks pregnant. In my first trimester nearly three month back I got sores on my tongue which I am still dealing with off and on. It caused sore neck, pain in tonsils and throat. I feel like phlegm stuck in throat. I also am suffering from GERD. Now from past some days I am experiencing a pull from chin to throat. A pain sort of from sides of neck upto collar bone, itchiness, both sides. Pain in throat, sometimes in tonsils too. I also have a bulge on left side of collar bone. It's painful sometimes. Besides that I have occasional pain in limbs - in past three month it's has been terrible three times, otherwise bearable. I feel pain at some spots on my upper back too. I am wondering is it pregnancy or something else.