Could I be having vocal nodules?? ?

I love singing and has taken up vocal lessons for about half a year. I know the proper way of singing. But recently, like 2 months back, I had a seriously bad flu and sore throat. After I had recover, the past 1 month, my throat has still been hurting. Recently this 1 week, my vocal seems to be feeling very tired and at times, seems hard just to project my voice out for speaking. When I tried to sing abit, my voice just seems to be very unstable and keep cracking. I can't even reach the high notes which I usually can. My throat seems to have lots of phlegm and I kept needing to clear it. But I am afraid that it might just be a throat infection. I did went to check my throat like a year ago because I thought it was vocal noudles, but it ended up to be just a serious infection. Any advice is appreciated. Thank you.