BOSTON — After blowing a colossal lead in a gut-busting loss to the Los Angeles Lakers on Thursday night, the Celtics continued to give fans heart palpitations Saturday night against LA’s other team — the Clippers. The C’s saw a 28-point first-half lead disappear, and ultimately fell 123-112 at TD Garden. To add on, the Celtics lost Kyrie Irving for the second half because of a right knee strain. He finished with 14 points. Gordon Hayward led the Celtics with 19 points. Montrezl Harrell had 21 while Danilo Galinari had 19 for the Clippers. The Celtics move to 35-21 with the loss, while the Clippers climb to 31-26 with the with.