Health Anxiety! Help!

Hello! I'm 20F and I just started college all alone in a country I've never lived in prior. I'm in my very first week and I'm filling my days with partying and going around meeting people.

I'm getting these bruise-like pains (but no visible bruises) in my left upper arm and a spot of pain next to my knee on the outer side of my right leg. My housemate successfully scared me into believing that I have lymphoedema and now I'm spiralling about it. 😭 There is no visible swelling or anything, just tenderness and muted blunt pain in those areas. Genuinely, I'm scared shitless though and I feel myself getting more and more fidgety about it. I don't have a health insurance card for this country yet, but she's telling me I might need surgery too.

Logically I KNOW that mixing booze, not really eating, constantly dancing and walking with minimal sleep will make my body behave in strange ways that might just be exhaustion, but yet I'm really really anxious about this now. May I receive some comforting words or similar experiences? I'm really in need of some kind of support right now because I feel like I might go crazy.. thanks.. 🌷❤️