Hi and welcome.
It is definitely not normal that you're account is being restricted after only sending a few messages.
It sounds like your email address may have been hacked and is being used to send SPAM emails to your contacts.
You will need to change your password ***** and see if the problem persist.
You can change your Google Account password ***** any time.
Once you do that, it should fix your problem.
Please try and let me know, if you have any questions also let me know.
If you can take a second to rate my service by clicking one of the stars at the top of the screen then submit, that would be greatly appreciated.
I'm sorry, I do not have a telephone number where I can be reached. I can offer remote desktop support to help you with this issue live on your computer.
I can offer remote assistance via a Remote Desktop Session.
I'm not aware of this being monthly, however, let me give you the contact information for customer service so you can call about your account:
Thank you also for your time.
Hi and welcome back
The link for the My Account is here >>> https://myaccount.google.com/
On that page, you will be asked for your email address and password.
Once logged in, click Sign-in & security
Next select Signing into Google
And follow the prompts to change your password.
If you have any questions, please let me know.