I've been through a similar malady and can only offer what has helped me. Others are more expert and can contribute more knowledgably.

Check the fit of your new clubs. You should not have to change your swing, IMO, to accommodate new clubs. The lie angle may be wrong for your size. Did you buy them at a pro shop? Have them or someone check to make sure they are properly fitted to you.

Go back over the basics, paying particular attention to grip and stance.

Getting in such a funk begets an escalating cycle of frustration which leads to increased tension. Try to relax again, swinging with a relaxed rhythm. Don't try to muscle the ball straight. A smooth forward swing coming from the inside and focusing upon the inside back quarter of the ball will square the clubhead for you.

I'm repeating myself, but I think tension is the greatest culprit. A bad result can lead to increased tension, and increased tension leads to additional bad results. Tension is so self-defeating.

Don't quit. Golf is like life. You never master it but you never quit. It's all about improvement, however incremental that is. And it is sometimes one step forward and two steps backwards.

Now, I've offered all my golfing wisdom, and then some. I'll let the experts take over.

Bill