I started using fluorouracil 7 days ago on my lips. Very swollen & sore. Any suggestions?

I did he chemo cream directly on my bottom lip for 4 weeks. It does go directly on your lips and I will tell you if you haven’t already experienced it for yourself it was the most brutal process and most painful thing I’ve ever gone through and I applied the chemo cream to a biopsy spot on my lip five days prior. I had nasty blisters scabs swelling couldn’t eat couldn’t sleep could only drink out of a straw I have Squamous cell carcinoma on my lower lip due to sun damage three weeks prior to that I
had squamous cell carcinoma a 5 x 7 patch of skin removed from my right upper thigh in the front. I have three more spots that I have to have a cut out one is on the side of my cheek and two on my left leg this is not fun stuff at all and anybody who is reading this if you are in the sun or if you go into a tanning bed I highly advise you to stop now This has been a very brutal process.

I've been trying to research that to no avail. I started putting it on my upper lip today. I cant find out what happens if it gets in your mouth. Do you have any innsight on that. Good luck... I'll keep in touch if I find out more!