4 weeks 3 days.... advice please

I’m 4 weeks and 3 days today, I got my BFP on Xmas eve, I’m extremely excited and happy and so is my husband but I’m always petrified I no I can’t alter the fate of my pregnancy what will be will be but I’m analysing every niggle like today I’ve work up with lower back pain on my right side it’s not consistent, it’s not sharpe it’s more of a dull ache when I bend or move turn etc (so maybe muscle?!) but now tonight I have the odd stomach ache/cramp again nothing extreme nothing sharpe or crippling just niggles which worry me my husbands good but he just says don’t panic what will be will be.... why has my excitement almost all gone 😥 I’m now just left with fear 😪

To top it off I’m feeling really unwell tonight my throat is closing and I can feel a lump when I swallow so I think I’m emotional becos I’m unwell but has

anyone experienced the little niggles? Anyone in the same boat? I’m googling everything with is surprisingly reassuring but my panic is taking over my all other rational thinking