In need of major help with macbook

If you erased the partitions, they are gone now. You can recover data though, if you want.
Does the internal HDD show up in Disk Utility?

 

And do you want to recover data from that HDD, or is your backup sufficient enough?

 

Then:
To retrieve files, that have been deleted and also been emptied from the Trash or accidentally formatted, you can use

Data Rescue 3 (trial lets you scan the HDD and see, if data is recoverable, but to actually recover files, you need to buy the full version for 99 USD) or
FileSalvage (trial lets you scan the HDD and see, if data is recoverable, but to actually recover files, you need to buy the full version for 89.95 USD).
DiskDrill - lets you recover data from HFS/HFS+, FAT, NTFS & other file systems right on your Mac., for free.​

Also know, that you should immediately stop any writing processes to the actual HDD. If it is the same HDD as the one your operating system (OS) resides on, it is better to use an external HDD with Mac OS X on to boot from and install Data Rescue or FileSalvage onto to scan the HDD from which the data has been accidentally deleted.

 

Set up time machine next time.