Help :( ..Everything was going great..grrrr...Is this what I think It is?

[Ivy123]

I am so sorry I dont have pics ( so much spent on gardening crap lo) Ill try to get someone over to take a pic later on)

I took my evening stroll thru my container gardener ( bout 22 of them)..I was bragging, everything looked so picture perfect, not one yellow leaf etc....except a few smooth pin head sized bite marks on the new leaves of a couple of my pepper plants.

Then i happen to notice about a 2' split/splayed open , in the stem of my yellow crook neck squash..It did not have 'frass' a tell tell sign of the bug... I also didn't see any swelling of the stem ( were the larva would live..
Feeling a little more confident, I went back out to examine the leaves.. On two of the bottom leaves were larva/nits whatever you wanna callem grrrrr....Having lil experience,,I had no idea if they were aphids , babys of the squash host or what..I detached the infested leaves..I read that you could dig the worm out or go up and punture the stem with a needle...As proud looking as it was yesterday, today its showing slight wilt.. ...I only planted one squash/not to be repeated lol
Ive quarantined the squash..

Q's> is it too far gone or a loosing battle to save this huge gorgeous plant?.Is it too late to plant another( in fresh soil)...are there any other varietys that are resistant to bore worm -besides spaghetti squash.. ugh lo

I really appreciate any help, and look> my talkativeness was kept it to a minimum of verbiage overspill loll
P.S. I really found this link very helpful in battling insects/with pics.. Natural Insect Control