Ok as an update, she's relaxed again today, she's settled right down again, napping and eating normally. Still concerned as to what might have been the cause though!
To generally note her surgery time, it was the 21st of march so we're quite a long ways in to healing.
@wiggypig
She is on some meds, she's on loxicom(the metacam alternative thingy), I did give her, her dose slightly earlier when she started acting up because I was concerned she was uncomfortable, it didn't seem to make a difference at all. I give her pretty regular check overs, she does have a bit of a skin condition that we've never been able to work out the issue, we've tried all sorts, done tests, still has bouts where her skin gets dry and her hair falls out, it has never seen to irritate her as such but we are still investigating it, shes having mild symptoms of it at the moment, just a little dry skin not nearly as much as normal.
Thank you for the suggestions on socialising with her, she's a very guinea pigs-pig but as we're all in lock down and I'm low on other options, I'll try some of your advice and see if I can be more of her friend!
I'll have a chat with my vet but I suspect they wont have her in to physically check her. I'm keeping her meds all the same until the last stitches have fallen out, theres a couple left that haven't come out as fast as the rest but they look ok, no swelling or anything.
@Elthysia
Shes a week and a half(ish) post op, she's got a couple of stitches left I think, at the very least there's a small hard lump that feels the same as the stitches did. It doesn't seem to cause her pain if I gently squeeze it, its not swollen or oozing or anything it looks pretty much healed top to bottom of the line other than that lump.
I still have her on the loxicom as I'd quite like those last stitches to be gone so she doesn't start chewing on it now, she did have a bit of a go on it sa few days after the surgery but didn't do much damage luckily.
I hope it is just she's feeling more like her self! she always was a very sassy guinea pig with a lot of opinions, I'm not sure I've ever noticed my guinea pigs go into season before, but I guess they've always had friends in the cage during that time so they haven't wanted to GET anywhere.
Bit of a worrying time with the lockdown going on and not really being able to go to the vet too easily!
Fingers crossed she stays chilled out!
Thanks both of you for getting back to me!