You have some options with health insurance:
If you are planning on using healthcare.gov/ACA/marketplace insurance versus COBRA, and you want it to take effect on March 1, you will need to fill out an application February 15 or before---(but double check on this)---you may have to call and ask them. If you fill out an application February 16 through the end of February, an ACA plan will not take effect until April 1, I believe. You have 60 days prior to losing coverage or 60 days after loss of coverage to sign up for an ACA plan.
If you work for an employer with 20 or more employees (which I assume you do) and you weren't terminated for gross misconduct (which I assume you weren't), you will be eligible for COBRA coverage. It is simply an extension of your current insurance. However, it is expensive. You can get an estimate of how much your COBRA will be by taking Box 12, code DD, from your W-2 and dividing by 12. This would give you an estimate of your monthly premium. COBRA is retroactive to the date of loss of coverage, where ACA plans aren't, I don't believe.
You could also go on one of the above plans or your wife's plan, and your daughter may be eligible to go on CHIP (Children's Health Insurance Program) in your state. You'd just want to check out how it work in your state.
https://www.healthcare.gov/coverage-out ... nt-period/